Finding the Fourth Proportional to 3,105.54, 4,629.05 and 2,856.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.54 : 4,629.05 = 2,856.42 : x
2. Step 2: Convert to fraction form
   3,105.54/4,629.05 = 2,856.42/x
3. Step 3: Cross multiply
   3,105.54x = 4,629.05 × 2,856.42
4. Step 4: Simplify right side
   3,105.54x = 13,222,496.72
5. Step 5: Solve for x
   x = 13,222,496.72/3,105.54
6. Step 6: Final answer
   x = 4,257.71