Finding the Third Proportional to 111,166 and 172,403

Step by Step Solution

1. Step 1: Write the proportion equation
   111,166 : 172,403 = 172,403 : x
2. Step 2: Convert to fraction form
   111,166/172,403 = 172,403/x
3. Step 3: Cross multiply
   111,166x = 172,403 × 172,403
4. Step 4: Simplify right side
   111,166x = 29,722,794,409
5. Step 5: Solve for x
   x = 29,722,794,409/111,166
6. Step 6: Final answer
   x = 267,373.07