Finding the Third Proportional to 111,216.09 and 172,354.22

Step by Step Solution

1. Step 1: Write the proportion equation
   111,216.09 : 172,354.22 = 172,354.22 : x
2. Step 2: Convert to fraction form
   111,216.09/172,354.22 = 172,354.22/x
3. Step 3: Cross multiply
   111,216.09x = 172,354.22 × 172,354.22
4. Step 4: Simplify right side
   111,216.09x = 29,705,976,720.92
5. Step 5: Solve for x
   x = 29,705,976,720.92/111,216.09
6. Step 6: Final answer
   x = 267,101.42