Finding the Fourth Proportional to 15,839.34, 21,857.67 and 9,469.49

Step by Step Solution

1. Step 1: Write the proportion equation
   15,839.34 : 21,857.67 = 9,469.49 : x
2. Step 2: Convert to fraction form
   15,839.34/21,857.67 = 9,469.49/x
3. Step 3: Cross multiply
   15,839.34x = 21,857.67 × 9,469.49
4. Step 4: Simplify right side
   15,839.34x = 206,980,878.20
5. Step 5: Solve for x
   x = 206,980,878.20/15,839.34
6. Step 6: Final answer
   x = 13,067.52