Finding the Fourth Proportional to 704,801.86, 972,626.15 and 398,872.69

Step by Step Solution

1. Step 1: Write the proportion equation
   704,801.86 : 972,626.15 = 398,872.69 : x
2. Step 2: Convert to fraction form
   704,801.86/972,626.15 = 398,872.69/x
3. Step 3: Cross multiply
   704,801.86x = 972,626.15 × 398,872.69
4. Step 4: Simplify right side
   704,801.86x = 387,954,007,380.46
5. Step 5: Solve for x
   x = 387,954,007,380.46/704,801.86
6. Step 6: Final answer
   x = 550,444.08