Finding the Fourth Proportional to 21,061.38, 29,064.63 and 11,629.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.38 : 29,064.63 = 11,629.89 : x
2. Step 2: Convert to fraction form
   21,061.38/29,064.63 = 11,629.89/x
3. Step 3: Cross multiply
   21,061.38x = 29,064.63 × 11,629.89
4. Step 4: Simplify right side
   21,061.38x = 338,018,449.79
5. Step 5: Solve for x
   x = 338,018,449.79/21,061.38
6. Step 6: Final answer
   x = 16,049.21