Finding the Fourth Proportional to 5,580.41, 8,371.98 and 3,940.16

Step by Step Solution

1. Step 1: Write the proportion equation
   5,580.41 : 8,371.98 = 3,940.16 : x
2. Step 2: Convert to fraction form
   5,580.41/8,371.98 = 3,940.16/x
3. Step 3: Cross multiply
   5,580.41x = 8,371.98 × 3,940.16
4. Step 4: Simplify right side
   5,580.41x = 32,986,898.86
5. Step 5: Solve for x
   x = 32,986,898.86/5,580.41
6. Step 6: Final answer
   x = 5,911.20