Finding the Fourth Proportional to 8,667.62, 12,980.16 and 5,538.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.62 : 12,980.16 = 5,538.38 : x
2. Step 2: Convert to fraction form
   8,667.62/12,980.16 = 5,538.38/x
3. Step 3: Cross multiply
   8,667.62x = 12,980.16 × 5,538.38
4. Step 4: Simplify right side
   8,667.62x = 71,889,058.54
5. Step 5: Solve for x
   x = 71,889,058.54/8,667.62
6. Step 6: Final answer
   x = 8,293.98