Finding the Fourth Proportional to 8,550.24, 12,807.27 and 5,428.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,550.24 : 12,807.27 = 5,428.59 : x
2. Step 2: Convert to fraction form
   8,550.24/12,807.27 = 5,428.59/x
3. Step 3: Cross multiply
   8,550.24x = 12,807.27 × 5,428.59
4. Step 4: Simplify right side
   8,550.24x = 69,525,417.85
5. Step 5: Solve for x
   x = 69,525,417.85/8,550.24
6. Step 6: Final answer
   x = 8,131.40