Finding the Fourth Proportional to 9,960.55, 13,746.12 and 5,485.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,960.55 : 13,746.12 = 5,485.25 : x
2. Step 2: Convert to fraction form
   9,960.55/13,746.12 = 5,485.25/x
3. Step 3: Cross multiply
   9,960.55x = 13,746.12 × 5,485.25
4. Step 4: Simplify right side
   9,960.55x = 75,400,904.73
5. Step 5: Solve for x
   x = 75,400,904.73/9,960.55
6. Step 6: Final answer
   x = 7,569.96