Finding the Fourth Proportional to 21,846.26, 30,147.55 and 12,286.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,846.26 : 30,147.55 = 12,286.15 : x
2. Step 2: Convert to fraction form
   21,846.26/30,147.55 = 12,286.15/x
3. Step 3: Cross multiply
   21,846.26x = 30,147.55 × 12,286.15
4. Step 4: Simplify right side
   21,846.26x = 370,397,321.43
5. Step 5: Solve for x
   x = 370,397,321.43/21,846.26
6. Step 6: Final answer
   x = 16,954.72