Finding the Fourth Proportional to 21,844.26, 30,142.98 and 12,771.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,844.26 : 30,142.98 = 12,771.75 : x
2. Step 2: Convert to fraction form
   21,844.26/30,142.98 = 12,771.75/x
3. Step 3: Cross multiply
   21,844.26x = 30,142.98 × 12,771.75
4. Step 4: Simplify right side
   21,844.26x = 384,978,604.82
5. Step 5: Solve for x
   x = 384,978,604.82/21,844.26
6. Step 6: Final answer
   x = 17,623.79