Finding the Fourth Proportional to 3,906.30, 5,390.46 and 2,227.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.30 : 5,390.46 = 2,227.47 : x
2. Step 2: Convert to fraction form
   3,906.30/5,390.46 = 2,227.47/x
3. Step 3: Cross multiply
   3,906.30x = 5,390.46 × 2,227.47
4. Step 4: Simplify right side
   3,906.30x = 12,007,087.94
5. Step 5: Solve for x
   x = 12,007,087.94/3,906.30
6. Step 6: Final answer
   x = 3,073.78