Finding the Fourth Proportional to 4,078.42, 5,628.22 and 2,215.42

Step by Step Solution

1. Step 1: Write the proportion equation
   4,078.42 : 5,628.22 = 2,215.42 : x
2. Step 2: Convert to fraction form
   4,078.42/5,628.22 = 2,215.42/x
3. Step 3: Cross multiply
   4,078.42x = 5,628.22 × 2,215.42
4. Step 4: Simplify right side
   4,078.42x = 12,468,851.54
5. Step 5: Solve for x
   x = 12,468,851.54/4,078.42
6. Step 6: Final answer
   x = 3,057.28