Finding the Fourth Proportional to 12,867, 17,771.04 and 8,667.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,867 : 17,771.04 = 8,667.96 : x
2. Step 2: Convert to fraction form
   12,867/17,771.04 = 8,667.96/x
3. Step 3: Cross multiply
   12,867x = 17,771.04 × 8,667.96
4. Step 4: Simplify right side
   12,867x = 154,038,663.88
5. Step 5: Solve for x
   x = 154,038,663.88/12,867
6. Step 6: Final answer
   x = 11,971.61