Finding the Fourth Proportional to 3,947.33, 5,447.25 and 2,178.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.33 : 5,447.25 = 2,178.89 : x
2. Step 2: Convert to fraction form
   3,947.33/5,447.25 = 2,178.89/x
3. Step 3: Cross multiply
   3,947.33x = 5,447.25 × 2,178.89
4. Step 4: Simplify right side
   3,947.33x = 11,868,958.55
5. Step 5: Solve for x
   x = 11,868,958.55/3,947.33
6. Step 6: Final answer
   x = 3,006.83