Finding the Fourth Proportional to 8,459.75, 12,692.55 and 3,196.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,459.75 : 12,692.55 = 3,196.28 : x
2. Step 2: Convert to fraction form
   8,459.75/12,692.55 = 3,196.28/x
3. Step 3: Cross multiply
   8,459.75x = 12,692.55 × 3,196.28
4. Step 4: Simplify right side
   8,459.75x = 40,568,943.71
5. Step 5: Solve for x
   x = 40,568,943.71/8,459.75
6. Step 6: Final answer
   x = 4,795.53