Finding the Third Proportional to 331,229.25 and 718,470

Step by Step Solution

1. Step 1: Write the proportion equation
   331,229.25 : 718,470 = 718,470 : x
2. Step 2: Convert to fraction form
   331,229.25/718,470 = 718,470/x
3. Step 3: Cross multiply
   331,229.25x = 718,470 × 718,470
4. Step 4: Simplify right side
   331,229.25x = 516,199,140,900
5. Step 5: Solve for x
   x = 516,199,140,900/331,229.25
6. Step 6: Final answer
   x = 1,558,434.65