Finding the Fourth Proportional to 3,947.08, 5,407.42 and 3,799.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.08 : 5,407.42 = 3,799.36 : x
2. Step 2: Convert to fraction form
   3,947.08/5,407.42 = 3,799.36/x
3. Step 3: Cross multiply
   3,947.08x = 5,407.42 × 3,799.36
4. Step 4: Simplify right side
   3,947.08x = 20,544,735.25
5. Step 5: Solve for x
   x = 20,544,735.25/3,947.08
6. Step 6: Final answer
   x = 5,205.05