Finding the Fourth Proportional to 3,826.18, 5,280.38 and 2,147.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,826.18 : 5,280.38 = 2,147.71 : x
2. Step 2: Convert to fraction form
   3,826.18/5,280.38 = 2,147.71/x
3. Step 3: Cross multiply
   3,826.18x = 5,280.38 × 2,147.71
4. Step 4: Simplify right side
   3,826.18x = 11,340,717.10
5. Step 5: Solve for x
   x = 11,340,717.10/3,826.18
6. Step 6: Final answer
   x = 2,963.98