Finding the Fourth Proportional to 5,556.69, 8,325.81 and 3,909.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,556.69 : 8,325.81 = 3,909.78 : x
2. Step 2: Convert to fraction form
   5,556.69/8,325.81 = 3,909.78/x
3. Step 3: Cross multiply
   5,556.69x = 8,325.81 × 3,909.78
4. Step 4: Simplify right side
   5,556.69x = 32,552,085.42
5. Step 5: Solve for x
   x = 32,552,085.42/5,556.69
6. Step 6: Final answer
   x = 5,858.18