FV = Future Value
PV = Present Value
i = Interest Rate
n = Number of Years
In 5 years, we want to save 10,000 Eur. The interest rate is 3% p.a.
Thus:
PV = 10,000 * (1 / (1 + 0.03))^5
PV = 10,000 * (1 / 1.03)^5
PV = 10,000 * 0.8626
PV = 8,626 Eur must be deposited as a lump sum