Finding the Fourth Proportional to 21,658.38, 29,888.56 and 12,227.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,658.38 : 29,888.56 = 12,227.55 : x
2. Step 2: Convert to fraction form
   21,658.38/29,888.56 = 12,227.55/x
3. Step 3: Cross multiply
   21,658.38x = 29,888.56 × 12,227.55
4. Step 4: Simplify right side
   21,658.38x = 365,463,861.83
5. Step 5: Solve for x
   x = 365,463,861.83/21,658.38
6. Step 6: Final answer
   x = 16,874.02