Finding the Fourth Proportional to 21,441.94, 29,589.89 and 12,013.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,441.94 : 29,589.89 = 12,013.54 : x
2. Step 2: Convert to fraction form
   21,441.94/29,589.89 = 12,013.54/x
3. Step 3: Cross multiply
   21,441.94x = 29,589.89 × 12,013.54
4. Step 4: Simplify right side
   21,441.94x = 355,479,193.07
5. Step 5: Solve for x
   x = 355,479,193.07/21,441.94
6. Step 6: Final answer
   x = 16,578.69