Finding the Fourth Proportional to 12,257.78, 18,384.94 and 3,936.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,257.78 : 18,384.94 = 3,936.71 : x
2. Step 2: Convert to fraction form
   12,257.78/18,384.94 = 3,936.71/x
3. Step 3: Cross multiply
   12,257.78x = 18,384.94 × 3,936.71
4. Step 4: Simplify right side
   12,257.78x = 72,376,177.15
5. Step 5: Solve for x
   x = 72,376,177.15/12,257.78
6. Step 6: Final answer
   x = 5,904.51