Finding the Fourth Proportional to 9,721.35, 13,413.72 and 5,471.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.35 : 13,413.72 = 5,471.76 : x
2. Step 2: Convert to fraction form
   9,721.35/13,413.72 = 5,471.76/x
3. Step 3: Cross multiply
   9,721.35x = 13,413.72 × 5,471.76
4. Step 4: Simplify right side
   9,721.35x = 73,396,656.55
5. Step 5: Solve for x
   x = 73,396,656.55/9,721.35
6. Step 6: Final answer
   x = 7,550.05