Finding the Third Proportional to 331,123.50 and 715,165.50

Step by Step Solution

1. Step 1: Write the proportion equation
   331,123.50 : 715,165.50 = 715,165.50 : x
2. Step 2: Convert to fraction form
   331,123.50/715,165.50 = 715,165.50/x
3. Step 3: Cross multiply
   331,123.50x = 715,165.50 × 715,165.50
4. Step 4: Simplify right side
   331,123.50x = 511,461,692,390.25
5. Step 5: Solve for x
   x = 511,461,692,390.25/331,123.50
6. Step 6: Final answer
   x = 1,544,625.17