Finding the Fourth Proportional to 9,399.94, 12,989.02 and 8,944.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.94 : 12,989.02 = 8,944.45 : x
2. Step 2: Convert to fraction form
   9,399.94/12,989.02 = 8,944.45/x
3. Step 3: Cross multiply
   9,399.94x = 12,989.02 × 8,944.45
4. Step 4: Simplify right side
   9,399.94x = 116,179,639.94
5. Step 5: Solve for x
   x = 116,179,639.94/9,399.94
6. Step 6: Final answer
   x = 12,359.62