Finding the Third Proportional to 31,687 and 69,422

Step by Step Solution

1. Step 1: Write the proportion equation
   31,687 : 69,422 = 69,422 : x
2. Step 2: Convert to fraction form
   31,687/69,422 = 69,422/x
3. Step 3: Cross multiply
   31,687x = 69,422 × 69,422
4. Step 4: Simplify right side
   31,687x = 4,819,414,084
5. Step 5: Solve for x
   x = 4,819,414,084/31,687
6. Step 6: Final answer
   x = 152,094.36