Assuming that the 2011 sales are in 2011 $'s and that the 73% growth is in current $ values, then if current sales are x millions of 2008 $'s we have:

3554=x(1+75/100)

so:

x=3554/1.75 millions of $'s

To get the current sales in 2011 $'s do the same calculation (now x is current sales in 2011 $'s) except we replace the 75 by 53.

CB