Finding the Third Proportional to 31,930 and 69,691

Step by Step Solution

1. Step 1: Write the proportion equation
   31,930 : 69,691 = 69,691 : x
2. Step 2: Convert to fraction form
   31,930/69,691 = 69,691/x
3. Step 3: Cross multiply
   31,930x = 69,691 × 69,691
4. Step 4: Simplify right side
   31,930x = 4,856,835,481
5. Step 5: Solve for x
   x = 4,856,835,481/31,930
6. Step 6: Final answer
   x = 152,108.85