Finding the Third Proportional to 31,469 and 69,931

Step by Step Solution

1. Step 1: Write the proportion equation
   31,469 : 69,931 = 69,931 : x
2. Step 2: Convert to fraction form
   31,469/69,931 = 69,931/x
3. Step 3: Cross multiply
   31,469x = 69,931 × 69,931
4. Step 4: Simplify right side
   31,469x = 4,890,344,761
5. Step 5: Solve for x
   x = 4,890,344,761/31,469
6. Step 6: Final answer
   x = 155,401.98