Finding the Fourth Proportional to 2,042.28, 2,818.31 and 1,158.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.28 : 2,818.31 = 1,158.09 : x
2. Step 2: Convert to fraction form
   2,042.28/2,818.31 = 1,158.09/x
3. Step 3: Cross multiply
   2,042.28x = 2,818.31 × 1,158.09
4. Step 4: Simplify right side
   2,042.28x = 3,263,850.84
5. Step 5: Solve for x
   x = 3,263,850.84/2,042.28
6. Step 6: Final answer
   x = 1,598.14