Finding the Fourth Proportional to 21,049.36, 29,040.50 and 16,205.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,049.36 : 29,040.50 = 16,205.57 : x
2. Step 2: Convert to fraction form
   21,049.36/29,040.50 = 16,205.57/x
3. Step 3: Cross multiply
   21,049.36x = 29,040.50 × 16,205.57
4. Step 4: Simplify right side
   21,049.36x = 470,617,774.56
5. Step 5: Solve for x
   x = 470,617,774.56/21,049.36
6. Step 6: Final answer
   x = 22,357.82