Finding the Fourth Proportional to 12,807.06, 17,673.23 and 7,142.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.06 : 17,673.23 = 7,142.03 : x
2. Step 2: Convert to fraction form
   12,807.06/17,673.23 = 7,142.03/x
3. Step 3: Cross multiply
   12,807.06x = 17,673.23 × 7,142.03
4. Step 4: Simplify right side
   12,807.06x = 126,222,614.78
5. Step 5: Solve for x
   x = 126,222,614.78/12,807.06
6. Step 6: Final answer
   x = 9,855.71