Finding the Fourth Proportional to 21,025.85, 29,013.53 and 12,074.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,025.85 : 29,013.53 = 12,074.69 : x
2. Step 2: Convert to fraction form
   21,025.85/29,013.53 = 12,074.69/x
3. Step 3: Cross multiply
   21,025.85x = 29,013.53 × 12,074.69
4. Step 4: Simplify right side
   21,025.85x = 350,329,392.72
5. Step 5: Solve for x
   x = 350,329,392.72/21,025.85
6. Step 6: Final answer
   x = 16,661.85