Finding the Fourth Proportional to 21,061.20, 29,063.12 and 11,629.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.20 : 29,063.12 = 11,629.96 : x
2. Step 2: Convert to fraction form
   21,061.20/29,063.12 = 11,629.96/x
3. Step 3: Cross multiply
   21,061.20x = 29,063.12 × 11,629.96
4. Step 4: Simplify right side
   21,061.20x = 338,002,923.08
5. Step 5: Solve for x
   x = 338,002,923.08/21,061.20
6. Step 6: Final answer
   x = 16,048.61