I've already done over half of the problem. It's pretty long and the thing that really sucks is that I have three chances to get a correct answer before I have to restart with another similar problem so i'd really appreciate someone that knows what they're doing here to help me out.

The problem goes:

A toy tractor is sold for $263 in 1979 and was sold again in 1985 for $416. Assume that the growth V of the collector's item was exponential.

work done so far--

k=0.076

V(t)=263e^0.076t

The part that I need help with is this:

Q: Find the amount of time after which the value of the toy tractor will be $4,171

*the answer is not (36.2)