Finding the Fourth Proportional to 2,561.40, 3,540.38 and 2,336.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.40 : 3,540.38 = 2,336.49 : x
2. Step 2: Convert to fraction form
   2,561.40/3,540.38 = 2,336.49/x
3. Step 3: Cross multiply
   2,561.40x = 3,540.38 × 2,336.49
4. Step 4: Simplify right side
   2,561.40x = 8,272,050.78
5. Step 5: Solve for x
   x = 8,272,050.78/2,561.40
6. Step 6: Final answer
   x = 3,229.50