Finding the Fourth Proportional to 3,826.78, 5,281.16 and 2,148.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,826.78 : 5,281.16 = 2,148.72 : x
2. Step 2: Convert to fraction form
   3,826.78/5,281.16 = 2,148.72/x
3. Step 3: Cross multiply
   3,826.78x = 5,281.16 × 2,148.72
4. Step 4: Simplify right side
   3,826.78x = 11,347,734.12
5. Step 5: Solve for x
   x = 11,347,734.12/3,826.78
6. Step 6: Final answer
   x = 2,965.35