Finding the Third Proportional to 31,939.13 and 67,188.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,939.13 : 67,188.75 = 67,188.75 : x
2. Step 2: Convert to fraction form
   31,939.13/67,188.75 = 67,188.75/x
3. Step 3: Cross multiply
   31,939.13x = 67,188.75 × 67,188.75
4. Step 4: Simplify right side
   31,939.13x = 4,514,328,126.56
5. Step 5: Solve for x
   x = 4,514,328,126.56/31,939.13
6. Step 6: Final answer
   x = 141,341.63