Finding the Fourth Proportional to 2,576.39, 3,555.41 and 1,397.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.39 : 3,555.41 = 1,397.48 : x
2. Step 2: Convert to fraction form
   2,576.39/3,555.41 = 1,397.48/x
3. Step 3: Cross multiply
   2,576.39x = 3,555.41 × 1,397.48
4. Step 4: Simplify right side
   2,576.39x = 4,968,589.60
5. Step 5: Solve for x
   x = 4,968,589.60/2,576.39
6. Step 6: Final answer
   x = 1,928.51