Finding the Fourth Proportional to 3,947.69, 5,447.73 and 2,179.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.69 : 5,447.73 = 2,179.25 : x
2. Step 2: Convert to fraction form
   3,947.69/5,447.73 = 2,179.25/x
3. Step 3: Cross multiply
   3,947.69x = 5,447.73 × 2,179.25
4. Step 4: Simplify right side
   3,947.69x = 11,871,979.22
5. Step 5: Solve for x
   x = 11,871,979.22/3,947.69
6. Step 6: Final answer
   x = 3,007.33