Finding the Fourth Proportional to 3,906.53, 5,390.73 and 2,227.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.53 : 5,390.73 = 2,227.55 : x
2. Step 2: Convert to fraction form
   3,906.53/5,390.73 = 2,227.55/x
3. Step 3: Cross multiply
   3,906.53x = 5,390.73 × 2,227.55
4. Step 4: Simplify right side
   3,906.53x = 12,008,117.72
5. Step 5: Solve for x
   x = 12,008,117.72/3,906.53
6. Step 6: Final answer
   x = 3,073.86