Finding the Third Proportional to 122,328 and 172,261.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,328 : 172,261.50 = 172,261.50 : x
2. Step 2: Convert to fraction form
   122,328/172,261.50 = 172,261.50/x
3. Step 3: Cross multiply
   122,328x = 172,261.50 × 172,261.50
4. Step 4: Simplify right side
   122,328x = 29,674,024,382.25
5. Step 5: Solve for x
   x = 29,674,024,382.25/122,328
6. Step 6: Final answer
   x = 242,577.53