Finding the Third Proportional to 425,430 and 658,660.50

Step by Step Solution

1. Step 1: Write the proportion equation
   425,430 : 658,660.50 = 658,660.50 : x
2. Step 2: Convert to fraction form
   425,430/658,660.50 = 658,660.50/x
3. Step 3: Cross multiply
   425,430x = 658,660.50 × 658,660.50
4. Step 4: Simplify right side
   425,430x = 433,833,654,260.25
5. Step 5: Solve for x
   x = 433,833,654,260.25/425,430
6. Step 6: Final answer
   x = 1,019,753.32