Hiya Natmarie
The 4.5M comes from the 150K pa divided by the adopted interest rate of 3% to give 5M less his 350K current equity....
The numbers are like this
150,000/0.03 = 5,000,000
5,000,000-350,000 = 4,650,000 which is approx 4,500,000 in the overall scheme of things.
Pedro