Finding the Third Proportional to 80,810 and 171,988

Step by Step Solution

1. Step 1: Write the proportion equation
   80,810 : 171,988 = 171,988 : x
2. Step 2: Convert to fraction form
   80,810/171,988 = 171,988/x
3. Step 3: Cross multiply
   80,810x = 171,988 × 171,988
4. Step 4: Simplify right side
   80,810x = 29,579,872,144
5. Step 5: Solve for x
   x = 29,579,872,144/80,810
6. Step 6: Final answer
   x = 366,042.22