Finding the Fourth Proportional to 2,576.72, 3,555.83 and 1,397.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.72 : 3,555.83 = 1,397.77 : x
2. Step 2: Convert to fraction form
   2,576.72/3,555.83 = 1,397.77/x
3. Step 3: Cross multiply
   2,576.72x = 3,555.83 × 1,397.77
4. Step 4: Simplify right side
   2,576.72x = 4,970,227.10
5. Step 5: Solve for x
   x = 4,970,227.10/2,576.72
6. Step 6: Final answer
   x = 1,928.89