Finding the Fourth Proportional to 2,042.40, 2,818.89 and 1,158.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.40 : 2,818.89 = 1,158.42 : x
2. Step 2: Convert to fraction form
   2,042.40/2,818.89 = 1,158.42/x
3. Step 3: Cross multiply
   2,042.40x = 2,818.89 × 1,158.42
4. Step 4: Simplify right side
   2,042.40x = 3,265,458.55
5. Step 5: Solve for x
   x = 3,265,458.55/2,042.40
6. Step 6: Final answer
   x = 1,598.83