Final answer:
To ensure your child is able to withdraw $14,700 per year for four years starting when he turns 19, you would need to deposit approximately $27,877.49 three years from now.
Step-by-step explanation:
To find the single amount of the deposit three years from now that will ensure your child is able to withdraw $14,700 per year for four years starting when he turns 19, we can use the formula for compound interest:
$14,700 = X(1 + rac{0.0662}{2})^{2(19-6)}
Simplifying the equation:
$14,700 = X(1 + 0.0331)^{26}
Next, divide both sides of the equation by (1 + 0.0331)^{26} to isolate X:
X = rac{14,700}{(1 + 0.0331)^{26}}
Using a calculator, we can calculate that X is approximately $27,877.49.