Finding the Third Proportional to 78,073.50 and 173,616

Step by Step Solution

1. Step 1: Write the proportion equation
   78,073.50 : 173,616 = 173,616 : x
2. Step 2: Convert to fraction form
   78,073.50/173,616 = 173,616/x
3. Step 3: Cross multiply
   78,073.50x = 173,616 × 173,616
4. Step 4: Simplify right side
   78,073.50x = 30,142,515,456
5. Step 5: Solve for x
   x = 30,142,515,456/78,073.50
6. Step 6: Final answer
   x = 386,078.70