Finding the Fourth Proportional to 2,565.30, 3,540.59 and 1,621.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,565.30 : 3,540.59 = 1,621.55 : x
2. Step 2: Convert to fraction form
   2,565.30/3,540.59 = 1,621.55/x
3. Step 3: Cross multiply
   2,565.30x = 3,540.59 × 1,621.55
4. Step 4: Simplify right side
   2,565.30x = 5,741,217.90
5. Step 5: Solve for x
   x = 5,741,217.90/2,565.30
6. Step 6: Final answer
   x = 2,238.03