Finding the Fourth Proportional to 12,222.72, 18,323.96 and 10,658.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,222.72 : 18,323.96 = 10,658.88 : x
2. Step 2: Convert to fraction form
   12,222.72/18,323.96 = 10,658.88/x
3. Step 3: Cross multiply
   12,222.72x = 18,323.96 × 10,658.88
4. Step 4: Simplify right side
   12,222.72x = 195,312,890.76
5. Step 5: Solve for x
   x = 195,312,890.76/12,222.72
6. Step 6: Final answer
   x = 15,979.49