Finding the Fourth Proportional to 3,056.55, 4,585.59 and 865.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,056.55 : 4,585.59 = 865.23 : x
2. Step 2: Convert to fraction form
   3,056.55/4,585.59 = 865.23/x
3. Step 3: Cross multiply
   3,056.55x = 4,585.59 × 865.23
4. Step 4: Simplify right side
   3,056.55x = 3,967,590.04
5. Step 5: Solve for x
   x = 3,967,590.04/3,056.55
6. Step 6: Final answer
   x = 1,298.06