That�s a fair indication and jno�s 10 per cent from 2000 is almost spot on. But it really depends upon what factorisation method you use and the purposes for the calculation. As it says on jno�s link �There is more than one way to translate prices and values from past times into the present. For different purposes�. They use the �average earnings' calc. For other estimations, in 2006 �12,000 from 1896 would equate to:
�954,630.56 using the retail price index
�1,204,093.76 using the GDP deflator
�5,292,521.41 using average earnings
�6,497,386.82 using per capita GDP
�9,932,228.51 using the GDP
Contrary to jno though, I would be tempted to spend it all at once! Either that or invest it and see what it could be worth in 2100!