Finding the Third Proportional to 111,490 and 172,755

Step by Step Solution

1. Step 1: Write the proportion equation
   111,490 : 172,755 = 172,755 : x
2. Step 2: Convert to fraction form
   111,490/172,755 = 172,755/x
3. Step 3: Cross multiply
   111,490x = 172,755 × 172,755
4. Step 4: Simplify right side
   111,490x = 29,844,290,025
5. Step 5: Solve for x
   x = 29,844,290,025/111,490
6. Step 6: Final answer
   x = 267,685.80