Finding the Third Proportional to 31,658.11 and 68,938.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,658.11 : 68,938.55 = 68,938.55 : x
2. Step 2: Convert to fraction form
   31,658.11/68,938.55 = 68,938.55/x
3. Step 3: Cross multiply
   31,658.11x = 68,938.55 × 68,938.55
4. Step 4: Simplify right side
   31,658.11x = 4,752,524,255.08
5. Step 5: Solve for x
   x = 4,752,524,255.08/31,658.11
6. Step 6: Final answer
   x = 150,120.29