Finding the Fourth Proportional to 16,288.96, 22,478.88 and 9,664.96

Step by Step Solution

1. Step 1: Write the proportion equation
   16,288.96 : 22,478.88 = 9,664.96 : x
2. Step 2: Convert to fraction form
   16,288.96/22,478.88 = 9,664.96/x
3. Step 3: Cross multiply
   16,288.96x = 22,478.88 × 9,664.96
4. Step 4: Simplify right side
   16,288.96x = 217,257,476.04
5. Step 5: Solve for x
   x = 217,257,476.04/16,288.96
6. Step 6: Final answer
   x = 13,337.71