Finding the Fourth Proportional to 10,221.65, 14,105.42 and 5,745.29

Step by Step Solution

1. Step 1: Write the proportion equation
   10,221.65 : 14,105.42 = 5,745.29 : x
2. Step 2: Convert to fraction form
   10,221.65/14,105.42 = 5,745.29/x
3. Step 3: Cross multiply
   10,221.65x = 14,105.42 × 5,745.29
4. Step 4: Simplify right side
   10,221.65x = 81,039,629.22
5. Step 5: Solve for x
   x = 81,039,629.22/10,221.65
6. Step 6: Final answer
   x = 7,928.24