Finding the Fourth Proportional to 2,042.45, 2,818.72 and 1,158.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.45 : 2,818.72 = 1,158.31 : x
2. Step 2: Convert to fraction form
   2,042.45/2,818.72 = 1,158.31/x
3. Step 3: Cross multiply
   2,042.45x = 2,818.72 × 1,158.31
4. Step 4: Simplify right side
   2,042.45x = 3,264,963.76
5. Step 5: Solve for x
   x = 3,264,963.76/2,042.45
6. Step 6: Final answer
   x = 1,598.55