Finding the Fourth Proportional to 2,559.78, 3,533.52 and 1,615.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.78 : 3,533.52 = 1,615.41 : x
2. Step 2: Convert to fraction form
   2,559.78/3,533.52 = 1,615.41/x
3. Step 3: Cross multiply
   2,559.78x = 3,533.52 × 1,615.41
4. Step 4: Simplify right side
   2,559.78x = 5,708,083.54
5. Step 5: Solve for x
   x = 5,708,083.54/2,559.78
6. Step 6: Final answer
   x = 2,229.91