Finding the Third Proportional to 31,449 and 68,730

Step by Step Solution

1. Step 1: Write the proportion equation
   31,449 : 68,730 = 68,730 : x
2. Step 2: Convert to fraction form
   31,449/68,730 = 68,730/x
3. Step 3: Cross multiply
   31,449x = 68,730 × 68,730
4. Step 4: Simplify right side
   31,449x = 4,723,812,900
5. Step 5: Solve for x
   x = 4,723,812,900/31,449
6. Step 6: Final answer
   x = 150,205.50