Finding the Fourth Proportional to 8,711.86, 12,022.41 and 5,355.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,711.86 : 12,022.41 = 5,355.22 : x
2. Step 2: Convert to fraction form
   8,711.86/12,022.41 = 5,355.22/x
3. Step 3: Cross multiply
   8,711.86x = 12,022.41 × 5,355.22
4. Step 4: Simplify right side
   8,711.86x = 64,382,650.48
5. Step 5: Solve for x
   x = 64,382,650.48/8,711.86
6. Step 6: Final answer
   x = 7,390.23