Finding the Fourth Proportional to 16,626.78, 22,945.20 and 9,916.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,626.78 : 22,945.20 = 9,916.31 : x
2. Step 2: Convert to fraction form
   16,626.78/22,945.20 = 9,916.31/x
3. Step 3: Cross multiply
   16,626.78x = 22,945.20 × 9,916.31
4. Step 4: Simplify right side
   16,626.78x = 227,531,601.49
5. Step 5: Solve for x
   x = 227,531,601.49/16,626.78
6. Step 6: Final answer
   x = 13,684.65