Finding the Fourth Proportional to 10,443.81, 14,413.19 and 5,728.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,443.81 : 14,413.19 = 5,728.40 : x
2. Step 2: Convert to fraction form
   10,443.81/14,413.19 = 5,728.40/x
3. Step 3: Cross multiply
   10,443.81x = 14,413.19 × 5,728.40
4. Step 4: Simplify right side
   10,443.81x = 82,564,416.89
5. Step 5: Solve for x
   x = 82,564,416.89/10,443.81
6. Step 6: Final answer
   x = 7,905.58