Finding the Fourth Proportional to 2,576.54, 3,555.61 and 1,397.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.54 : 3,555.61 = 1,397.61 : x
2. Step 2: Convert to fraction form
   2,576.54/3,555.61 = 1,397.61/x
3. Step 3: Cross multiply
   2,576.54x = 3,555.61 × 1,397.61
4. Step 4: Simplify right side
   2,576.54x = 4,969,352.60
5. Step 5: Solve for x
   x = 4,969,352.60/2,576.54
6. Step 6: Final answer
   x = 1,928.69