Finding the Third Proportional to 122,310.50 and 172,240

Step by Step Solution

1. Step 1: Write the proportion equation
   122,310.50 : 172,240 = 172,240 : x
2. Step 2: Convert to fraction form
   122,310.50/172,240 = 172,240/x
3. Step 3: Cross multiply
   122,310.50x = 172,240 × 172,240
4. Step 4: Simplify right side
   122,310.50x = 29,666,617,600
5. Step 5: Solve for x
   x = 29,666,617,600/122,310.50
6. Step 6: Final answer
   x = 242,551.68