Finding the Fourth Proportional to 2,558.89, 3,531.18 and 1,565.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.89 : 3,531.18 = 1,565.20 : x
2. Step 2: Convert to fraction form
   2,558.89/3,531.18 = 1,565.20/x
3. Step 3: Cross multiply
   2,558.89x = 3,531.18 × 1,565.20
4. Step 4: Simplify right side
   2,558.89x = 5,527,002.94
5. Step 5: Solve for x
   x = 5,527,002.94/2,558.89
6. Step 6: Final answer
   x = 2,159.92