Finding the Fourth Proportional to 2,659.89, 3,644.08 and 2,560.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.89 : 3,644.08 = 2,560.15 : x
2. Step 2: Convert to fraction form
   2,659.89/3,644.08 = 2,560.15/x
3. Step 3: Cross multiply
   2,659.89x = 3,644.08 × 2,560.15
4. Step 4: Simplify right side
   2,659.89x = 9,329,391.41
5. Step 5: Solve for x
   x = 9,329,391.41/2,659.89
6. Step 6: Final answer
   x = 3,507.44