Finding the Fourth Proportional to 5,513.10, 8,257.77 and 2,587.02

Step by Step Solution

1. Step 1: Write the proportion equation
   5,513.10 : 8,257.77 = 2,587.02 : x
2. Step 2: Convert to fraction form
   5,513.10/8,257.77 = 2,587.02/x
3. Step 3: Cross multiply
   5,513.10x = 8,257.77 × 2,587.02
4. Step 4: Simplify right side
   5,513.10x = 21,363,016.15
5. Step 5: Solve for x
   x = 21,363,016.15/5,513.10
6. Step 6: Final answer
   x = 3,874.96