Finding the Fourth Proportional to 21,223.42, 29,287.07 and 12,270.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,223.42 : 29,287.07 = 12,270.29 : x
2. Step 2: Convert to fraction form
   21,223.42/29,287.07 = 12,270.29/x
3. Step 3: Cross multiply
   21,223.42x = 29,287.07 × 12,270.29
4. Step 4: Simplify right side
   21,223.42x = 359,360,680.38
5. Step 5: Solve for x
   x = 359,360,680.38/21,223.42
6. Step 6: Final answer
   x = 16,932.27