Answer:
15.87%
Step-by-step explanation:
Internal rate of return is a method of calculating an investment’s rate of return. The term internal refers to the fact that the calculation excludes external factors, such as the risk-free rate, inflation, the cost of capital, or financial risk.
Let IRR be x%
IRR, present value of inflows=present value of outflows.
114100=36900/1.0x+45600/1.0x^2+56300/1.0x^3+21800/1.0x^4
Hence
x = IRR = 15.87%