Finding the Fourth Proportional to 8,118.37, 12,178.83 and 3,438.41

Step by Step Solution

1. Step 1: Write the proportion equation
   8,118.37 : 12,178.83 = 3,438.41 : x
2. Step 2: Convert to fraction form
   8,118.37/12,178.83 = 3,438.41/x
3. Step 3: Cross multiply
   8,118.37x = 12,178.83 × 3,438.41
4. Step 4: Simplify right side
   8,118.37x = 41,875,761.75
5. Step 5: Solve for x
   x = 41,875,761.75/8,118.37
6. Step 6: Final answer
   x = 5,158.15