Finding the Fourth Proportional to 2,399.34, 3,308.89 and 1,513.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.34 : 3,308.89 = 1,513.61 : x
2. Step 2: Convert to fraction form
   2,399.34/3,308.89 = 1,513.61/x
3. Step 3: Cross multiply
   2,399.34x = 3,308.89 × 1,513.61
4. Step 4: Simplify right side
   2,399.34x = 5,008,344.88
5. Step 5: Solve for x
   x = 5,008,344.88/2,399.34
6. Step 6: Final answer
   x = 2,087.38