Finding the Fourth Proportional to 12,040.46, 16,619.69 and 8,456.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,040.46 : 16,619.69 = 8,456.28 : x
2. Step 2: Convert to fraction form
   12,040.46/16,619.69 = 8,456.28/x
3. Step 3: Cross multiply
   12,040.46x = 16,619.69 × 8,456.28
4. Step 4: Simplify right side
   12,040.46x = 140,540,709.87
5. Step 5: Solve for x
   x = 140,540,709.87/12,040.46
6. Step 6: Final answer
   x = 11,672.38