Finding the Third Proportional to 331,687.50 and 725,430

Step by Step Solution

1. Step 1: Write the proportion equation
   331,687.50 : 725,430 = 725,430 : x
2. Step 2: Convert to fraction form
   331,687.50/725,430 = 725,430/x
3. Step 3: Cross multiply
   331,687.50x = 725,430 × 725,430
4. Step 4: Simplify right side
   331,687.50x = 526,248,684,900
5. Step 5: Solve for x
   x = 526,248,684,900/331,687.50
6. Step 6: Final answer
   x = 1,586,579.79