Finding the Fourth Proportional to 3,906.16, 5,390.82 and 2,227.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.16 : 5,390.82 = 2,227.64 : x
2. Step 2: Convert to fraction form
   3,906.16/5,390.82 = 2,227.64/x
3. Step 3: Cross multiply
   3,906.16x = 5,390.82 × 2,227.64
4. Step 4: Simplify right side
   3,906.16x = 12,008,779.31
5. Step 5: Solve for x
   x = 12,008,779.31/3,906.16
6. Step 6: Final answer
   x = 3,074.32