Finding the Third Proportional to 487,132.50 and 728,718

Step by Step Solution

1. Step 1: Write the proportion equation
   487,132.50 : 728,718 = 728,718 : x
2. Step 2: Convert to fraction form
   487,132.50/728,718 = 728,718/x
3. Step 3: Cross multiply
   487,132.50x = 728,718 × 728,718
4. Step 4: Simplify right side
   487,132.50x = 531,029,923,524
5. Step 5: Solve for x
   x = 531,029,923,524/487,132.50
6. Step 6: Final answer
   x = 1,090,113.93