Finding the Fourth Proportional to 18,655.62, 27,964.72 and 8,667.38

Step by Step Solution

1. Step 1: Write the proportion equation
   18,655.62 : 27,964.72 = 8,667.38 : x
2. Step 2: Convert to fraction form
   18,655.62/27,964.72 = 8,667.38/x
3. Step 3: Cross multiply
   18,655.62x = 27,964.72 × 8,667.38
4. Step 4: Simplify right side
   18,655.62x = 242,380,854.83
5. Step 5: Solve for x
   x = 242,380,854.83/18,655.62
6. Step 6: Final answer
   x = 12,992.38