Finding the Third Proportional to 31,939.88 and 67,189.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,939.88 : 67,189.88 = 67,189.88 : x
2. Step 2: Convert to fraction form
   31,939.88/67,189.88 = 67,189.88/x
3. Step 3: Cross multiply
   31,939.88x = 67,189.88 × 67,189.88
4. Step 4: Simplify right side
   31,939.88x = 4,514,479,302.52
5. Step 5: Solve for x
   x = 4,514,479,302.52/31,939.88
6. Step 6: Final answer
   x = 141,343.05