Finding the Fourth Proportional to 8,555.52, 12,824.63 and 3,561.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,555.52 : 12,824.63 = 3,561.57 : x
2. Step 2: Convert to fraction form
   8,555.52/12,824.63 = 3,561.57/x
3. Step 3: Cross multiply
   8,555.52x = 12,824.63 × 3,561.57
4. Step 4: Simplify right side
   8,555.52x = 45,675,813.02
5. Step 5: Solve for x
   x = 45,675,813.02/8,555.52
6. Step 6: Final answer
   x = 5,338.75