Finding the Fourth Proportional to 3,945.18, 5,439.51 and 3,196.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.18 : 5,439.51 = 3,196.38 : x
2. Step 2: Convert to fraction form
   3,945.18/5,439.51 = 3,196.38/x
3. Step 3: Cross multiply
   3,945.18x = 5,439.51 × 3,196.38
4. Step 4: Simplify right side
   3,945.18x = 17,386,740.97
5. Step 5: Solve for x
   x = 17,386,740.97/3,945.18
6. Step 6: Final answer
   x = 4,407.08