Finding the Fourth Proportional to 11,513.12, 15,895.98 and 8,819.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,513.12 : 15,895.98 = 8,819.60 : x
2. Step 2: Convert to fraction form
   11,513.12/15,895.98 = 8,819.60/x
3. Step 3: Cross multiply
   11,513.12x = 15,895.98 × 8,819.60
4. Step 4: Simplify right side
   11,513.12x = 140,196,105.73
5. Step 5: Solve for x
   x = 140,196,105.73/11,513.12
6. Step 6: Final answer
   x = 12,177.08