Finding the Fourth Proportional to 12,808.86, 17,676.33 and 7,143.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,808.86 : 17,676.33 = 7,143.42 : x
2. Step 2: Convert to fraction form
   12,808.86/17,676.33 = 7,143.42/x
3. Step 3: Cross multiply
   12,808.86x = 17,676.33 × 7,143.42
4. Step 4: Simplify right side
   12,808.86x = 126,269,449.25
5. Step 5: Solve for x
   x = 126,269,449.25/12,808.86
6. Step 6: Final answer
   x = 9,857.98