Finding the Fourth Proportional to 3,617.78, 4,990.52 and 2,499.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,617.78 : 4,990.52 = 2,499.30 : x
2. Step 2: Convert to fraction form
   3,617.78/4,990.52 = 2,499.30/x
3. Step 3: Cross multiply
   3,617.78x = 4,990.52 × 2,499.30
4. Step 4: Simplify right side
   3,617.78x = 12,472,806.64
5. Step 5: Solve for x
   x = 12,472,806.64/3,617.78
6. Step 6: Final answer
   x = 3,447.64