Total investment = Rs 360000
Profit earned = 12%
∴ Total profit = 12% of 360000
= 12/100 × 360000 = Rs 43200
Proportion of investment = 3 : 4 : 7 : 6
Let the investment of Jaya, Seema, Nikhil and Neelesh be Rs 3x, Rs 4x, Rs 7x and Rs 6x respectively.
∴ Jaya’s investment = 3x = 3 x 18000 = Rs 54000 Also, profit made by them is Rs 43200
∴ Nikhil’s profit = 7x = 7 x 2160 = Rs 15120
∴ Jaya’s share in the capital was Rs 54000 and the profit made by Nikhil was Rs 15120.