Finding the Fourth Proportional to 2,491.88, 3,413.89 and 2,398.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,491.88 : 3,413.89 = 2,398.46 : x
2. Step 2: Convert to fraction form
   2,491.88/3,413.89 = 2,398.46/x
3. Step 3: Cross multiply
   2,491.88x = 3,413.89 × 2,398.46
4. Step 4: Simplify right side
   2,491.88x = 8,188,049.55
5. Step 5: Solve for x
   x = 8,188,049.55/2,491.88
6. Step 6: Final answer
   x = 3,285.90