Finding the Fourth Proportional to 5,216.96, 7,815.59 and 2,581.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,216.96 : 7,815.59 = 2,581.42 : x
2. Step 2: Convert to fraction form
   5,216.96/7,815.59 = 2,581.42/x
3. Step 3: Cross multiply
   5,216.96x = 7,815.59 × 2,581.42
4. Step 4: Simplify right side
   5,216.96x = 20,175,312.23
5. Step 5: Solve for x
   x = 20,175,312.23/5,216.96
6. Step 6: Final answer
   x = 3,867.26