Finding the Fourth Proportional to 3,942.54, 5,440.52 and 2,262.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.54 : 5,440.52 = 2,262.78 : x
2. Step 2: Convert to fraction form
   3,942.54/5,440.52 = 2,262.78/x
3. Step 3: Cross multiply
   3,942.54x = 5,440.52 × 2,262.78
4. Step 4: Simplify right side
   3,942.54x = 12,310,699.85
5. Step 5: Solve for x
   x = 12,310,699.85/3,942.54
6. Step 6: Final answer
   x = 3,122.53