Finding the Fourth Proportional to 3,826.35, 5,280.48 and 2,147.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,826.35 : 5,280.48 = 2,147.72 : x
2. Step 2: Convert to fraction form
   3,826.35/5,280.48 = 2,147.72/x
3. Step 3: Cross multiply
   3,826.35x = 5,280.48 × 2,147.72
4. Step 4: Simplify right side
   3,826.35x = 11,340,966.10
5. Step 5: Solve for x
   x = 11,340,966.10/3,826.35
6. Step 6: Final answer
   x = 2,963.91