Finding the Fourth Proportional to 3,667.57, 5,501.78 and 1,328.68

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.57 : 5,501.78 = 1,328.68 : x
2. Step 2: Convert to fraction form
   3,667.57/5,501.78 = 1,328.68/x
3. Step 3: Cross multiply
   3,667.57x = 5,501.78 × 1,328.68
4. Step 4: Simplify right side
   3,667.57x = 7,310,078.37
5. Step 5: Solve for x
   x = 7,310,078.37/3,667.57
6. Step 6: Final answer
   x = 1,993.17