Finding the Fourth Proportional to 12,143.29, 18,213.42 and 3,378.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,143.29 : 18,213.42 = 3,378.89 : x
2. Step 2: Convert to fraction form
   12,143.29/18,213.42 = 3,378.89/x
3. Step 3: Cross multiply
   12,143.29x = 18,213.42 × 3,378.89
4. Step 4: Simplify right side
   12,143.29x = 61,541,142.70
5. Step 5: Solve for x
   x = 61,541,142.70/12,143.29
6. Step 6: Final answer
   x = 5,067.91