Answer:
$1.55
Step-by-step explanation:
Interest rate parity = (1+Rh) / (1+Rf) = F1 / S0
Rh = rate on home currency here US is home 3% p.a = 3%/4 = 0.75%
Rf= rate on foreign currency here Germany 3.5% p.a = 3.5%/4 = 0.875
F1 = Forward rate , S0= Spot market rate
So, (1+0.0075) / (1+0.00875) = F1 / 1.56
1.0075/1.00875 = F1 / 1.56
0.998761 = F1 / 1.56
F1 = 0.998761 * 1.56
F1 = 1.55806716
F1 = $1.55
Thus, the 90-day forward rate is $1.55