Finding the Third Proportional to 152,712 and 315,900

Step by Step Solution

1. Step 1: Write the proportion equation
   152,712 : 315,900 = 315,900 : x
2. Step 2: Convert to fraction form
   152,712/315,900 = 315,900/x
3. Step 3: Cross multiply
   152,712x = 315,900 × 315,900
4. Step 4: Simplify right side
   152,712x = 99,792,810,000
5. Step 5: Solve for x
   x = 99,792,810,000/152,712
6. Step 6: Final answer
   x = 653,470.65