Finding the Third Proportional to 81,336 and 173,040

Step by Step Solution

1. Step 1: Write the proportion equation
   81,336 : 173,040 = 173,040 : x
2. Step 2: Convert to fraction form
   81,336/173,040 = 173,040/x
3. Step 3: Cross multiply
   81,336x = 173,040 × 173,040
4. Step 4: Simplify right side
   81,336x = 29,942,841,600
5. Step 5: Solve for x
   x = 29,942,841,600/81,336
6. Step 6: Final answer
   x = 368,137.62