Finding the Third Proportional to 356,361.50 and 718,555

Step by Step Solution

1. Step 1: Write the proportion equation
   356,361.50 : 718,555 = 718,555 : x
2. Step 2: Convert to fraction form
   356,361.50/718,555 = 718,555/x
3. Step 3: Cross multiply
   356,361.50x = 718,555 × 718,555
4. Step 4: Simplify right side
   356,361.50x = 516,321,288,025
5. Step 5: Solve for x
   x = 516,321,288,025/356,361.50
6. Step 6: Final answer
   x = 1,448,869.44