Finding the Third Proportional to 476,788 and 720,040

Step by Step Solution

1. Step 1: Write the proportion equation
   476,788 : 720,040 = 720,040 : x
2. Step 2: Convert to fraction form
   476,788/720,040 = 720,040/x
3. Step 3: Cross multiply
   476,788x = 720,040 × 720,040
4. Step 4: Simplify right side
   476,788x = 518,457,601,600
5. Step 5: Solve for x
   x = 518,457,601,600/476,788
6. Step 6: Final answer
   x = 1,087,396.50