Question 1173172
using the financial calculator found at <a href = "https://arachnoid.com/finance/index.html" target = "_blank">https://arachnoid.com/finance/index.html</a>, make the following inputs:
pv = 0
fv = 0
pmt = -500,000
ir = 12% per year / 4 = 3
payment at end


click on fv to get:
fv = 13,435,187.24


here's a display of the results.


<img src = "http://theo.x10hosting.com/2021/011702.jpg" >


the interest earned on the account is the future value minus the sum of the payments = 13,435,187.24 minus 20 * 500,000 = 3,435.1872.24.