Finding the Fourth Proportional to 3,826.58, 5,280.27 and 2,147.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,826.58 : 5,280.27 = 2,147.60 : x
2. Step 2: Convert to fraction form
   3,826.58/5,280.27 = 2,147.60/x
3. Step 3: Cross multiply
   3,826.58x = 5,280.27 × 2,147.60
4. Step 4: Simplify right side
   3,826.58x = 11,339,881.45
5. Step 5: Solve for x
   x = 11,339,881.45/3,826.58
6. Step 6: Final answer
   x = 2,963.45