Finding the Third Proportional to 31,418.72 and 67,757.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,418.72 : 67,757.91 = 67,757.91 : x
2. Step 2: Convert to fraction form
   31,418.72/67,757.91 = 67,757.91/x
3. Step 3: Cross multiply
   31,418.72x = 67,757.91 × 67,757.91
4. Step 4: Simplify right side
   31,418.72x = 4,591,133,859.38
5. Step 5: Solve for x
   x = 4,591,133,859.38/31,418.72
6. Step 6: Final answer
   x = 146,127.34