Finding the Fourth Proportional to 3,480.96, 5,217.72 and 2,555.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,480.96 : 5,217.72 = 2,555.10 : x
2. Step 2: Convert to fraction form
   3,480.96/5,217.72 = 2,555.10/x
3. Step 3: Cross multiply
   3,480.96x = 5,217.72 × 2,555.10
4. Step 4: Simplify right side
   3,480.96x = 13,331,796.37
5. Step 5: Solve for x
   x = 13,331,796.37/3,480.96
6. Step 6: Final answer
   x = 3,829.92