Finding the Third Proportional to 80,874 and 172,831

Step by Step Solution

1. Step 1: Write the proportion equation
   80,874 : 172,831 = 172,831 : x
2. Step 2: Convert to fraction form
   80,874/172,831 = 172,831/x
3. Step 3: Cross multiply
   80,874x = 172,831 × 172,831
4. Step 4: Simplify right side
   80,874x = 29,870,554,561
5. Step 5: Solve for x
   x = 29,870,554,561/80,874
6. Step 6: Final answer
   x = 369,346.82