Finding the Third Proportional to 31,215.38 and 67,351.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,215.38 : 67,351.50 = 67,351.50 : x
2. Step 2: Convert to fraction form
   31,215.38/67,351.50 = 67,351.50/x
3. Step 3: Cross multiply
   31,215.38x = 67,351.50 × 67,351.50
4. Step 4: Simplify right side
   31,215.38x = 4,536,224,552.25
5. Step 5: Solve for x
   x = 4,536,224,552.25/31,215.38
6. Step 6: Final answer
   x = 145,320.20