Finding the Fourth Proportional to 9,721.86, 13,413.88 and 5,743.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.86 : 13,413.88 = 5,743.56 : x
2. Step 2: Convert to fraction form
   9,721.86/13,413.88 = 5,743.56/x
3. Step 3: Cross multiply
   9,721.86x = 13,413.88 × 5,743.56
4. Step 4: Simplify right side
   9,721.86x = 77,043,424.61
5. Step 5: Solve for x
   x = 77,043,424.61/9,721.86
6. Step 6: Final answer
   x = 7,924.76