Finding the Fourth Proportional to 1,078.52, 1,616.18 and 616.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.52 : 1,616.18 = 616.43 : x
2. Step 2: Convert to fraction form
   1,078.52/1,616.18 = 616.43/x
3. Step 3: Cross multiply
   1,078.52x = 1,616.18 × 616.43
4. Step 4: Simplify right side
   1,078.52x = 996,262.80
5. Step 5: Solve for x
   x = 996,262.80/1,078.52
6. Step 6: Final answer
   x = 923.74