Finding the Fourth Proportional to 2,576.43, 3,555.36 and 1,397.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.43 : 3,555.36 = 1,397.52 : x
2. Step 2: Convert to fraction form
   2,576.43/3,555.36 = 1,397.52/x
3. Step 3: Cross multiply
   2,576.43x = 3,555.36 × 1,397.52
4. Step 4: Simplify right side
   2,576.43x = 4,968,686.71
5. Step 5: Solve for x
   x = 4,968,686.71/2,576.43
6. Step 6: Final answer
   x = 1,928.52