Capital Gain Tax on Sale of Property inherited

Hi,

i sold property of my father purchased in 27.04.2005 for Rs.197400/- after his and my mother death.  He dies on 15.08.2009 and my mother died on 11.02.2010.  i have two brothers and one sister.  i sold the property for Rs.20 Lakhs and paid a commission of Rs.45,000/-.  Each one got a share of Rs.5 Lakhs by DD.  As i wanted to pay tax and use the money, kindly advise me how much tax i need to pay ?  i have made a rough calculation and advise me if the same is correct.

Cost of property purchased on 27.04.2005     Rs.1,80,000 + commission of Rs.17,400     Total   1,97,400.00

Cost of sale of property in Oct 2010                  Rs.20,00,000 - commission of Rs.45,000    Total 19,55,000.00

Short gain capital gain                                                                                                                                   17,57,600.00

my share                                                                                                                                                             4,39,400.00

Awaiting for your kind advise.

Regards

SIVAPRAKASH