Finding the Third Proportional to 78,480.50 and 171,792

Step by Step Solution

1. Step 1: Write the proportion equation
   78,480.50 : 171,792 = 171,792 : x
2. Step 2: Convert to fraction form
   78,480.50/171,792 = 171,792/x
3. Step 3: Cross multiply
   78,480.50x = 171,792 × 171,792
4. Step 4: Simplify right side
   78,480.50x = 29,512,491,264
5. Step 5: Solve for x
   x = 29,512,491,264/78,480.50
6. Step 6: Final answer
   x = 376,048.72