19. Compute the compound interest

Find the compound interest at the rate of 12.4 \(\%\) per annum for 3 years on the principal, which in 2 years at the rate of 7.9 \(\%\) per annum gives 3074 as simple interest. (Use: ${\left(1.124\right)}^3$ \(\approx\) 1.42)

 

Answer:

 

The compound interest \(=\) \(₹\).

 

[Note: Submit the answer a whole whole number.]