Finding the Fourth Proportional to 3,520.28, 4,856.60 and 2,261.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,520.28 : 4,856.60 = 2,261.15 : x
2. Step 2: Convert to fraction form
   3,520.28/4,856.60 = 2,261.15/x
3. Step 3: Cross multiply
   3,520.28x = 4,856.60 × 2,261.15
4. Step 4: Simplify right side
   3,520.28x = 10,981,501.93
5. Step 5: Solve for x
   x = 10,981,501.93/3,520.28
6. Step 6: Final answer
   x = 3,119.50