Finding the Fourth Proportional to 12,143.14, 18,204.89 and 5,118.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,143.14 : 18,204.89 = 5,118.62 : x
2. Step 2: Convert to fraction form
   12,143.14/18,204.89 = 5,118.62/x
3. Step 3: Cross multiply
   12,143.14x = 18,204.89 × 5,118.62
4. Step 4: Simplify right side
   12,143.14x = 93,183,797.43
5. Step 5: Solve for x
   x = 93,183,797.43/12,143.14
6. Step 6: Final answer
   x = 7,673.78