UK property portal provider Rightmove plc announced on Wednesday that its board has unanimously rejected the third increased takeover bid from Rupert Murdoch’s REA Group in Australia. REA, which is majority-owned by the tycoon’s News Corp group, said it put forward a 770p-a-share proposal on September 22 valuing Rightmove at about £6.1 billion ($8.16 billion). The board has concluded that the increased proposal continues to be unattractive and materially undervalues the company and its future prospects. The increased proposal was 341 pence in cash and 0.0422 new REA shares for each Rightmove o…