Finding the Fourth Proportional to 713,401.56, 984,493.89 and 391,104.74

Step by Step Solution

1. Step 1: Write the proportion equation
   713,401.56 : 984,493.89 = 391,104.74 : x
2. Step 2: Convert to fraction form
   713,401.56/984,493.89 = 391,104.74/x
3. Step 3: Cross multiply
   713,401.56x = 984,493.89 × 391,104.74
4. Step 4: Simplify right side
   713,401.56x = 385,040,221,957.57
5. Step 5: Solve for x
   x = 385,040,221,957.57/713,401.56
6. Step 6: Final answer
   x = 539,724.39