Finding the Fourth Proportional to 8,499.36, 12,662.87 and 8,081.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.36 : 12,662.87 = 8,081.12 : x
2. Step 2: Convert to fraction form
   8,499.36/12,662.87 = 8,081.12/x
3. Step 3: Cross multiply
   8,499.36x = 12,662.87 × 8,081.12
4. Step 4: Simplify right side
   8,499.36x = 102,330,172.01
5. Step 5: Solve for x
   x = 102,330,172.01/8,499.36
6. Step 6: Final answer
   x = 12,039.75