Finding the Fourth Proportional to 1,078.56, 1,616.27 and 584.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.56 : 1,616.27 = 584.55 : x
2. Step 2: Convert to fraction form
   1,078.56/1,616.27 = 584.55/x
3. Step 3: Cross multiply
   1,078.56x = 1,616.27 × 584.55
4. Step 4: Simplify right side
   1,078.56x = 944,788.82
5. Step 5: Solve for x
   x = 944,788.82/1,078.56
6. Step 6: Final answer
   x = 875.97