Finding the Fourth Proportional to 12,798.38, 17,661.50 and 7,133.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,798.38 : 17,661.50 = 7,133.12 : x
2. Step 2: Convert to fraction form
   12,798.38/17,661.50 = 7,133.12/x
3. Step 3: Cross multiply
   12,798.38x = 17,661.50 × 7,133.12
4. Step 4: Simplify right side
   12,798.38x = 125,981,598.88
5. Step 5: Solve for x
   x = 125,981,598.88/12,798.38
6. Step 6: Final answer
   x = 9,843.56