Finding the Fourth Proportional to 21,227.16, 31,839.12 and 8,743.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,227.16 : 31,839.12 = 8,743.98 : x
2. Step 2: Convert to fraction form
   21,227.16/31,839.12 = 8,743.98/x
3. Step 3: Cross multiply
   21,227.16x = 31,839.12 × 8,743.98
4. Step 4: Simplify right side
   21,227.16x = 278,400,628.50
5. Step 5: Solve for x
   x = 278,400,628.50/21,227.16
6. Step 6: Final answer
   x = 13,115.30