Finding the Fourth Proportional to 10,826.56, 16,209.88 and 5,550.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,826.56 : 16,209.88 = 5,550.20 : x
2. Step 2: Convert to fraction form
   10,826.56/16,209.88 = 5,550.20/x
3. Step 3: Cross multiply
   10,826.56x = 16,209.88 × 5,550.20
4. Step 4: Simplify right side
   10,826.56x = 89,968,075.98
5. Step 5: Solve for x
   x = 89,968,075.98/10,826.56
6. Step 6: Final answer
   x = 8,309.94