Finding the Fourth Proportional to 21,222.69, 29,291.54 and 12,269.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,222.69 : 29,291.54 = 12,269.76 : x
2. Step 2: Convert to fraction form
   21,222.69/29,291.54 = 12,269.76/x
3. Step 3: Cross multiply
   21,222.69x = 29,291.54 × 12,269.76
4. Step 4: Simplify right side
   21,222.69x = 359,400,104.48
5. Step 5: Solve for x
   x = 359,400,104.48/21,222.69
6. Step 6: Final answer
   x = 16,934.71