Finding the Fourth Proportional to 2,396.78, 3,591.90 and 1,243.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,396.78 : 3,591.90 = 1,243.34 : x
2. Step 2: Convert to fraction form
   2,396.78/3,591.90 = 1,243.34/x
3. Step 3: Cross multiply
   2,396.78x = 3,591.90 × 1,243.34
4. Step 4: Simplify right side
   2,396.78x = 4,465,952.95
5. Step 5: Solve for x
   x = 4,465,952.95/2,396.78
6. Step 6: Final answer
   x = 1,863.31