Finding the Fourth Proportional to 9,800.38, 13,518.65 and 9,144.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,800.38 : 13,518.65 = 9,144.28 : x
2. Step 2: Convert to fraction form
   9,800.38/13,518.65 = 9,144.28/x
3. Step 3: Cross multiply
   9,800.38x = 13,518.65 × 9,144.28
4. Step 4: Simplify right side
   9,800.38x = 123,618,309.89
5. Step 5: Solve for x
   x = 123,618,309.89/9,800.38
6. Step 6: Final answer
   x = 12,613.63