Finding the Fourth Proportional to 3,826.42, 5,280.72 and 2,255.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,826.42 : 5,280.72 = 2,255.42 : x
2. Step 2: Convert to fraction form
   3,826.42/5,280.72 = 2,255.42/x
3. Step 3: Cross multiply
   3,826.42x = 5,280.72 × 2,255.42
4. Step 4: Simplify right side
   3,826.42x = 11,910,241.50
5. Step 5: Solve for x
   x = 11,910,241.50/3,826.42
6. Step 6: Final answer
   x = 3,112.63