Finding the Fourth Proportional to 9,720.82, 13,413.45 and 5,472.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,720.82 : 13,413.45 = 5,472.10 : x
2. Step 2: Convert to fraction form
   9,720.82/13,413.45 = 5,472.10/x
3. Step 3: Cross multiply
   9,720.82x = 13,413.45 × 5,472.10
4. Step 4: Simplify right side
   9,720.82x = 73,399,739.75
5. Step 5: Solve for x
   x = 73,399,739.75/9,720.82
6. Step 6: Final answer
   x = 7,550.78