Finding the Third Proportional to 31,240 and 67,469

Step by Step Solution

1. Step 1: Write the proportion equation
   31,240 : 67,469 = 67,469 : x
2. Step 2: Convert to fraction form
   31,240/67,469 = 67,469/x
3. Step 3: Cross multiply
   31,240x = 67,469 × 67,469
4. Step 4: Simplify right side
   31,240x = 4,552,065,961
5. Step 5: Solve for x
   x = 4,552,065,961/31,240
6. Step 6: Final answer
   x = 145,712.74