Finding the Fourth Proportional to 3,815.24, 5,261.15 and 2,556.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,815.24 : 5,261.15 = 2,556.09 : x
2. Step 2: Convert to fraction form
   3,815.24/5,261.15 = 2,556.09/x
3. Step 3: Cross multiply
   3,815.24x = 5,261.15 × 2,556.09
4. Step 4: Simplify right side
   3,815.24x = 13,447,979.29
5. Step 5: Solve for x
   x = 13,447,979.29/3,815.24
6. Step 6: Final answer
   x = 3,524.81