Finding the Fourth Proportional to 9,945.55, 13,640.77 and 8,824.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.55 : 13,640.77 = 8,824.54 : x
2. Step 2: Convert to fraction form
   9,945.55/13,640.77 = 8,824.54/x
3. Step 3: Cross multiply
   9,945.55x = 13,640.77 × 8,824.54
4. Step 4: Simplify right side
   9,945.55x = 120,373,476.18
5. Step 5: Solve for x
   x = 120,373,476.18/9,945.55
6. Step 6: Final answer
   x = 12,103.25