Finding the Fourth Proportional to 8,022.18, 12,039.74 and 3,408.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,022.18 : 12,039.74 = 3,408.42 : x
2. Step 2: Convert to fraction form
   8,022.18/12,039.74 = 3,408.42/x
3. Step 3: Cross multiply
   8,022.18x = 12,039.74 × 3,408.42
4. Step 4: Simplify right side
   8,022.18x = 41,036,490.61
5. Step 5: Solve for x
   x = 41,036,490.61/8,022.18
6. Step 6: Final answer
   x = 5,115.38