Finding the Third Proportional to 31,422.38 and 66,076.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,422.38 : 66,076.31 = 66,076.31 : x
2. Step 2: Convert to fraction form
   31,422.38/66,076.31 = 66,076.31/x
3. Step 3: Cross multiply
   31,422.38x = 66,076.31 × 66,076.31
4. Step 4: Simplify right side
   31,422.38x = 4,366,079,073.60
5. Step 5: Solve for x
   x = 4,366,079,073.60/31,422.38
6. Step 6: Final answer
   x = 138,948.09