Finding the Fourth Proportional to 8,570.24, 12,856.43 and 3,305.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,570.24 : 12,856.43 = 3,305.10 : x
2. Step 2: Convert to fraction form
   8,570.24/12,856.43 = 3,305.10/x
3. Step 3: Cross multiply
   8,570.24x = 12,856.43 × 3,305.10
4. Step 4: Simplify right side
   8,570.24x = 42,491,786.79
5. Step 5: Solve for x
   x = 42,491,786.79/8,570.24
6. Step 6: Final answer
   x = 4,958.06