Finding the Fourth Proportional to 5,408.56, 8,109.98 and 2,556.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,408.56 : 8,109.98 = 2,556.05 : x
2. Step 2: Convert to fraction form
   5,408.56/8,109.98 = 2,556.05/x
3. Step 3: Cross multiply
   5,408.56x = 8,109.98 × 2,556.05
4. Step 4: Simplify right side
   5,408.56x = 20,729,501.60
5. Step 5: Solve for x
   x = 20,729,501.60/5,408.56
6. Step 6: Final answer
   x = 3,832.72