Finding the Fourth Proportional to 21,103.86, 29,122.83 and 11,672.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,103.86 : 29,122.83 = 11,672.22 : x
2. Step 2: Convert to fraction form
   21,103.86/29,122.83 = 11,672.22/x
3. Step 3: Cross multiply
   21,103.86x = 29,122.83 × 11,672.22
4. Step 4: Simplify right side
   21,103.86x = 339,928,078.78
5. Step 5: Solve for x
   x = 339,928,078.78/21,103.86
6. Step 6: Final answer
   x = 16,107.39