Finding the Fourth Proportional to 2,576.31, 3,555.31 and 1,397.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.31 : 3,555.31 = 1,397.38 : x
2. Step 2: Convert to fraction form
   2,576.31/3,555.31 = 1,397.38/x
3. Step 3: Cross multiply
   2,576.31x = 3,555.31 × 1,397.38
4. Step 4: Simplify right side
   2,576.31x = 4,968,119.09
5. Step 5: Solve for x
   x = 4,968,119.09/2,576.31
6. Step 6: Final answer
   x = 1,928.39