Finding the Third Proportional to 81,039 and 173,418

Step by Step Solution

1. Step 1: Write the proportion equation
   81,039 : 173,418 = 173,418 : x
2. Step 2: Convert to fraction form
   81,039/173,418 = 173,418/x
3. Step 3: Cross multiply
   81,039x = 173,418 × 173,418
4. Step 4: Simplify right side
   81,039x = 30,073,802,724
5. Step 5: Solve for x
   x = 30,073,802,724/81,039
6. Step 6: Final answer
   x = 371,102.84