Finding the Fourth Proportional to 21,227.67, 29,294.46 and 12,275.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,227.67 : 29,294.46 = 12,275.55 : x
2. Step 2: Convert to fraction form
   21,227.67/29,294.46 = 12,275.55/x
3. Step 3: Cross multiply
   21,227.67x = 29,294.46 × 12,275.55
4. Step 4: Simplify right side
   21,227.67x = 359,605,608.45
5. Step 5: Solve for x
   x = 359,605,608.45/21,227.67
6. Step 6: Final answer
   x = 16,940.42