Finding the Fourth Proportional to 21,628.24, 29,846.16 and 12,067.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,628.24 : 29,846.16 = 12,067.72 : x
2. Step 2: Convert to fraction form
   21,628.24/29,846.16 = 12,067.72/x
3. Step 3: Cross multiply
   21,628.24x = 29,846.16 × 12,067.72
4. Step 4: Simplify right side
   21,628.24x = 360,175,101.96
5. Step 5: Solve for x
   x = 360,175,101.96/21,628.24
6. Step 6: Final answer
   x = 16,653.00