Finding the Third Proportional to 148,108.50 and 315,900

Step by Step Solution

1. Step 1: Write the proportion equation
   148,108.50 : 315,900 = 315,900 : x
2. Step 2: Convert to fraction form
   148,108.50/315,900 = 315,900/x
3. Step 3: Cross multiply
   148,108.50x = 315,900 × 315,900
4. Step 4: Simplify right side
   148,108.50x = 99,792,810,000
5. Step 5: Solve for x
   x = 99,792,810,000/148,108.50
6. Step 6: Final answer
   x = 673,781.79