Finding the Fourth Proportional to 9,960.56, 13,745.61 and 5,484.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,960.56 : 13,745.61 = 5,484.20 : x
2. Step 2: Convert to fraction form
   9,960.56/13,745.61 = 5,484.20/x
3. Step 3: Cross multiply
   9,960.56x = 13,745.61 × 5,484.20
4. Step 4: Simplify right side
   9,960.56x = 75,383,674.36
5. Step 5: Solve for x
   x = 75,383,674.36/9,960.56
6. Step 6: Final answer
   x = 7,568.22