Finding the Fourth Proportional to 9,720.03, 13,413.61 and 5,528.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,720.03 : 13,413.61 = 5,528.28 : x
2. Step 2: Convert to fraction form
   9,720.03/13,413.61 = 5,528.28/x
3. Step 3: Cross multiply
   9,720.03x = 13,413.61 × 5,528.28
4. Step 4: Simplify right side
   9,720.03x = 74,154,191.89
5. Step 5: Solve for x
   x = 74,154,191.89/9,720.03
6. Step 6: Final answer
   x = 7,629.01