Finding the Fourth Proportional to 7,091.36, 9,786.24 and 3,947.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,091.36 : 9,786.24 = 3,947.34 : x
2. Step 2: Convert to fraction form
   7,091.36/9,786.24 = 3,947.34/x
3. Step 3: Cross multiply
   7,091.36x = 9,786.24 × 3,947.34
4. Step 4: Simplify right side
   7,091.36x = 38,629,616.60
5. Step 5: Solve for x
   x = 38,629,616.60/7,091.36
6. Step 6: Final answer
   x = 5,447.42