Finding the Fourth Proportional to 8,143.72, 12,216.78 and 2,948.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,143.72 : 12,216.78 = 2,948.38 : x
2. Step 2: Convert to fraction form
   8,143.72/12,216.78 = 2,948.38/x
3. Step 3: Cross multiply
   8,143.72x = 12,216.78 × 2,948.38
4. Step 4: Simplify right side
   8,143.72x = 36,019,709.82
5. Step 5: Solve for x
   x = 36,019,709.82/8,143.72
6. Step 6: Final answer
   x = 4,423.00