Finding the Fourth Proportional to 898,993.98, 1,240,607.91 and 496,585.98

Step by Step Solution

1. Step 1: Write the proportion equation
   898,993.98 : 1,240,607.91 = 496,585.98 : x
2. Step 2: Convert to fraction form
   898,993.98/1,240,607.91 = 496,585.98/x
3. Step 3: Cross multiply
   898,993.98x = 1,240,607.91 × 496,585.98
4. Step 4: Simplify right side
   898,993.98x = 616,068,494,783.10
5. Step 5: Solve for x
   x = 616,068,494,783.10/898,993.98
6. Step 6: Final answer
   x = 685,286.56