Finding the Fourth Proportional to 3,940.86, 5,438.82 and 2,262.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.86 : 5,438.82 = 2,262.36 : x
2. Step 2: Convert to fraction form
   3,940.86/5,438.82 = 2,262.36/x
3. Step 3: Cross multiply
   3,940.86x = 5,438.82 × 2,262.36
4. Step 4: Simplify right side
   3,940.86x = 12,304,568.82
5. Step 5: Solve for x
   x = 12,304,568.82/3,940.86
6. Step 6: Final answer
   x = 3,122.31