Finding the Fourth Proportional to 8,559.48, 12,829.32 and 3,621.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,559.48 : 12,829.32 = 3,621.72 : x
2. Step 2: Convert to fraction form
   8,559.48/12,829.32 = 3,621.72/x
3. Step 3: Cross multiply
   8,559.48x = 12,829.32 × 3,621.72
4. Step 4: Simplify right side
   8,559.48x = 46,464,204.83
5. Step 5: Solve for x
   x = 46,464,204.83/8,559.48
6. Step 6: Final answer
   x = 5,428.39