Finding the Third Proportional to 31,649 and 67,388

Step by Step Solution

1. Step 1: Write the proportion equation
   31,649 : 67,388 = 67,388 : x
2. Step 2: Convert to fraction form
   31,649/67,388 = 67,388/x
3. Step 3: Cross multiply
   31,649x = 67,388 × 67,388
4. Step 4: Simplify right side
   31,649x = 4,541,142,544
5. Step 5: Solve for x
   x = 4,541,142,544/31,649
6. Step 6: Final answer
   x = 143,484.55