we assume the interest specified is an annual interest rate

since no equation has been provided, we use the following formula for calculating the value of an annuity:

t = p[((1+r)^n - 1)/r] where 't' is the current total value, 'p' is the payment amount, 'r' is the normalized interest rate and 'n' is the number of payments

3*4 = 12 quarterly payments over 3 years

10 / 4 = 2.5% quarterly interest

t = 500((1+0.025)^12 - 1)/0.025 = 6897.77

Based on the assumptions we have made, the future value of the annuity will be approximately $6,898