Finding the Fourth Proportional to 21,616.54, 29,835.61 and 14,049.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,616.54 : 29,835.61 = 14,049.72 : x
2. Step 2: Convert to fraction form
   21,616.54/29,835.61 = 14,049.72/x
3. Step 3: Cross multiply
   21,616.54x = 29,835.61 × 14,049.72
4. Step 4: Simplify right side
   21,616.54x = 419,181,931.40
5. Step 5: Solve for x
   x = 419,181,931.40/21,616.54
6. Step 6: Final answer
   x = 19,391.72