Finding the Fourth Proportional to 2,615.63, 3,606.98 and 2,399.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.63 : 3,606.98 = 2,399.53 : x
2. Step 2: Convert to fraction form
   2,615.63/3,606.98 = 2,399.53/x
3. Step 3: Cross multiply
   2,615.63x = 3,606.98 × 2,399.53
4. Step 4: Simplify right side
   2,615.63x = 8,655,053.70
5. Step 5: Solve for x
   x = 8,655,053.70/2,615.63
6. Step 6: Final answer
   x = 3,308.98