Finding the Fourth Proportional to 10,443.78, 14,413.08 and 5,728.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,443.78 : 14,413.08 = 5,728.07 : x
2. Step 2: Convert to fraction form
   10,443.78/14,413.08 = 5,728.07/x
3. Step 3: Cross multiply
   10,443.78x = 14,413.08 × 5,728.07
4. Step 4: Simplify right side
   10,443.78x = 82,559,131.16
5. Step 5: Solve for x
   x = 82,559,131.16/10,443.78
6. Step 6: Final answer
   x = 7,905.10