Finding the Fourth Proportional to 16,399.85, 22,629.69 and 9,228.87

Step by Step Solution

1. Step 1: Write the proportion equation
   16,399.85 : 22,629.69 = 9,228.87 : x
2. Step 2: Convert to fraction form
   16,399.85/22,629.69 = 9,228.87/x
3. Step 3: Cross multiply
   16,399.85x = 22,629.69 × 9,228.87
4. Step 4: Simplify right side
   16,399.85x = 208,846,467.15
5. Step 5: Solve for x
   x = 208,846,467.15/16,399.85
6. Step 6: Final answer
   x = 12,734.66