Finding the Third Proportional to 111,184 and 172,419

Step by Step Solution

1. Step 1: Write the proportion equation
   111,184 : 172,419 = 172,419 : x
2. Step 2: Convert to fraction form
   111,184/172,419 = 172,419/x
3. Step 3: Cross multiply
   111,184x = 172,419 × 172,419
4. Step 4: Simplify right side
   111,184x = 29,728,311,561
5. Step 5: Solve for x
   x = 29,728,311,561/111,184
6. Step 6: Final answer
   x = 267,379.40