Finding the Fourth Proportional to 8,667.60, 12,993.72 and 3,669.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.60 : 12,993.72 = 3,669.36 : x
2. Step 2: Convert to fraction form
   8,667.60/12,993.72 = 3,669.36/x
3. Step 3: Cross multiply
   8,667.60x = 12,993.72 × 3,669.36
4. Step 4: Simplify right side
   8,667.60x = 47,678,636.42
5. Step 5: Solve for x
   x = 47,678,636.42/8,667.60
6. Step 6: Final answer
   x = 5,500.79