Finding the Fourth Proportional to 9,960.88, 13,745.92 and 5,484.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,960.88 : 13,745.92 = 5,484.55 : x
2. Step 2: Convert to fraction form
   9,960.88/13,745.92 = 5,484.55/x
3. Step 3: Cross multiply
   9,960.88x = 13,745.92 × 5,484.55
4. Step 4: Simplify right side
   9,960.88x = 75,390,089.38
5. Step 5: Solve for x
   x = 75,390,089.38/9,960.88
6. Step 6: Final answer
   x = 7,568.62