Yes, I agree with Buenchico's figure.
The calculation is similar to the last one but because interset is 4.1% the figure you multiply by each year is 1.041 , and the number of years is 3.
The calculation is: 10000 x 1.041³
Look at it this way.
In year 1 the interest is 4.1% of £10000 = £410. So the balalnce at the end of year 1 is £10410.
In year 2 the interest is 4.1% of the £10410 which is £426.81. This makes the year end balance at the end of year 2 equal to 10410+426.81= £10836.81
In year 3 the interest is 4.1% of £10836.81 which is £444.31, The balance at the end of year 3 is therefore 10836.81+444.31 =£11281.12
Just adjust the figures depending on your interest rate and number of years.
Excel is good for these. In your latest example I used the formula =10000*1.041^3
Hope this helps. Buenchico may be able to explain it better