Share of Rakesh : Share of Dinesh : Share of Mahesh
= 5000 : 8000 : 12000 = 5 : 8 : 12

Total earned profit = Rs.12500

Share of Dinesh in profit = \( \Large \frac{5}{5 + 8 + 12}\times12500 = \frac{8}{25} \times 12500 \)

= 8 X 500 = Rs.4000