Finding the Fourth Proportional to 21,057.89, 29,057.27 and 11,626.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,057.89 : 29,057.27 = 11,626.38 : x
2. Step 2: Convert to fraction form
   21,057.89/29,057.27 = 11,626.38/x
3. Step 3: Cross multiply
   21,057.89x = 29,057.27 × 11,626.38
4. Step 4: Simplify right side
   21,057.89x = 337,830,804.65
5. Step 5: Solve for x
   x = 337,830,804.65/21,057.89
6. Step 6: Final answer
   x = 16,042.96