Finding the Third Proportional to 476,785.50 and 720,039

Step by Step Solution

1. Step 1: Write the proportion equation
   476,785.50 : 720,039 = 720,039 : x
2. Step 2: Convert to fraction form
   476,785.50/720,039 = 720,039/x
3. Step 3: Cross multiply
   476,785.50x = 720,039 × 720,039
4. Step 4: Simplify right side
   476,785.50x = 518,456,161,521
5. Step 5: Solve for x
   x = 518,456,161,521/476,785.50
6. Step 6: Final answer
   x = 1,087,399.18