Finding the Fourth Proportional to 3,906.21, 5,390.52 and 2,227.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.21 : 5,390.52 = 2,227.58 : x
2. Step 2: Convert to fraction form
   3,906.21/5,390.52 = 2,227.58/x
3. Step 3: Cross multiply
   3,906.21x = 5,390.52 × 2,227.58
4. Step 4: Simplify right side
   3,906.21x = 12,007,787.59
5. Step 5: Solve for x
   x = 12,007,787.59/3,906.21
6. Step 6: Final answer
   x = 3,074.03