Fourth women's one-day international, Sydney: England 178-3 beat Australia 177 by seven wickets
Captain Charlotte Edwards was delighted by England's victory
England's women shrugged off the shock resignation of coach Mark Dobson to beat Australia by seven wickets.
Laura Marsh (3-18) and Nicki Shaw (3-37) did most of the damage at the Sydney Cricket Ground as they bowled out the home side for 177.
Skipper Charlotte Edwards then marked her 100th one-day international with an unbeaten 70 as England reached their target with four overs to spare.
They now lead the series 2-1 with only Monday's match remaining.
"It's been a fairytale game for me. To score 70 not out and hit the winning runs to beat Australia in Australia on my 100th ODI is fantastic," said Edwards, who shared a match-winning partnership of 131 with Claire Taylor (56).
"Our comeback in the field from 112-2 to 177 all out was the turning point for me.
"It showed our determination and put us in the driving seat going into our innings."
England's preparation had been far from ideal with Dobson quitting after only eight months in charge for personal reasons and his assistant Mark Lane taking over as head coach.
And although Shaw quickly removed Alex Blackwell after Australia won the toss and chose to bat, the hosts looked set for a big total as captain Karen Rolton (65) and Shelley Nitschke (54) put on 104 in 21 overs.
Left-arm spinner Holly Colvin made a crucial breakthrough when she had Rolton stumped by Sarah Taylor and the same combination also accounted for Lisa Sthalekar, who was caught behind for two.
England celebrate after Nick Shaw dismisses Shelley Nitschke
Wickets continued to tumble as Nitschke fell leg-before to medium-pacer Shaw, who also picked up the wicket of Kris Britt, thanks to Rosalie Birch's diving catch at mid-on.
Kate Blackwell (12) and Sarah Edwards (17) were the only remaining batters to reach double figures as two run-outs and an excellent spell from Marsh brought Australia's innings to an end after 49.2 overs - their last five wickets falling for only 31 runs.
England suffered two setbacks at the start of their reply as teenager Ellyse Perry won lbw decisions against openers Sarah Taylor (20) and Beth Morgan (10).
But Edwards and Claire Taylor, the two most experienced players in England's side, kept their heads and carried their team to the brink of victory before Taylor was run out.
"Batting on a pitch that was two-paced was hard work, but to have that partnership with Lottie was great. We were determined to put the team into a winning position by being patient," Taylor commented.
The end came from the final ball of the 46th over as England reached 178-3.