Finding the Third Proportional to 129,748,648.50 and 284,142,868.31

Step by Step Solution

1. Step 1: Write the proportion equation
   129,748,648.50 : 284,142,868.31 = 284,142,868.31 : x
2. Step 2: Convert to fraction form
   129,748,648.50/284,142,868.31 = 284,142,868.31/x
3. Step 3: Cross multiply
   129,748,648.50x = 284,142,868.31 × 284,142,868.31
4. Step 4: Simplify right side
   129,748,648.50x = 80,737,169,612,854,720
5. Step 5: Solve for x
   x = 80,737,169,612,854,720/129,748,648.50
6. Step 6: Final answer
   x = 622,258,270.48