Finding the Fourth Proportional to 6,469.98, 8,928.30 and 3,956.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,469.98 : 8,928.30 = 3,956.28 : x
2. Step 2: Convert to fraction form
   6,469.98/8,928.30 = 3,956.28/x
3. Step 3: Cross multiply
   6,469.98x = 8,928.30 × 3,956.28
4. Step 4: Simplify right side
   6,469.98x = 35,322,854.72
5. Step 5: Solve for x
   x = 35,322,854.72/6,469.98
6. Step 6: Final answer
   x = 5,459.50