Finding the Fourth Proportional to 2,339.52, 3,229.92 and 1,555.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.52 : 3,229.92 = 1,555.20 : x
2. Step 2: Convert to fraction form
   2,339.52/3,229.92 = 1,555.20/x
3. Step 3: Cross multiply
   2,339.52x = 3,229.92 × 1,555.20
4. Step 4: Simplify right side
   2,339.52x = 5,023,171.58
5. Step 5: Solve for x
   x = 5,023,171.58/2,339.52
6. Step 6: Final answer
   x = 2,147.09