acca考试科目P4 Plz help me to solve this mathematical equation

acca考试科目P4 Plz help me to solve this mathematical equation
Hi,
how to find the ‘i’ in this equation? please help! Thanks
0.579 x [180 x (1+i)² + 180 x (1+i) + 180]
26.62
= 13.893

Hi
In valuing investments (or real options) Pe is the the estimated cost of the investment, in this case $35m and Pa is the present value of the net receipts (i.e positive cash flows) which is the $38.75.