Finding the Third Proportional to 80,810 and 172,852

Step by Step Solution

1. Step 1: Write the proportion equation
   80,810 : 172,852 = 172,852 : x
2. Step 2: Convert to fraction form
   80,810/172,852 = 172,852/x
3. Step 3: Cross multiply
   80,810x = 172,852 × 172,852
4. Step 4: Simplify right side
   80,810x = 29,877,813,904
5. Step 5: Solve for x
   x = 29,877,813,904/80,810
6. Step 6: Final answer
   x = 369,729.17