Finding the Fourth Proportional to 6,447.29, 8,894.59 and 3,928.48

Step by Step Solution

1. Step 1: Write the proportion equation
   6,447.29 : 8,894.59 = 3,928.48 : x
2. Step 2: Convert to fraction form
   6,447.29/8,894.59 = 3,928.48/x
3. Step 3: Cross multiply
   6,447.29x = 8,894.59 × 3,928.48
4. Step 4: Simplify right side
   6,447.29x = 34,942,174.45
5. Step 5: Solve for x
   x = 34,942,174.45/6,447.29
6. Step 6: Final answer
   x = 5,419.67