Finding the Third Proportional to 122,317 and 172,248.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,317 : 172,248.50 = 172,248.50 : x
2. Step 2: Convert to fraction form
   122,317/172,248.50 = 172,248.50/x
3. Step 3: Cross multiply
   122,317x = 172,248.50 × 172,248.50
4. Step 4: Simplify right side
   122,317x = 29,669,545,752.25
5. Step 5: Solve for x
   x = 29,669,545,752.25/122,317
6. Step 6: Final answer
   x = 242,562.73