Finding the Fourth Proportional to 8,561.13, 12,824 and 5,040.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561.13 : 12,824 = 5,040.28 : x
2. Step 2: Convert to fraction form
   8,561.13/12,824 = 5,040.28/x
3. Step 3: Cross multiply
   8,561.13x = 12,824 × 5,040.28
4. Step 4: Simplify right side
   8,561.13x = 64,636,550.72
5. Step 5: Solve for x
   x = 64,636,550.72/8,561.13
6. Step 6: Final answer
   x = 7,550.00