Finding the Fourth Proportional to 3,086.88, 4,629.49 and 865.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.88 : 4,629.49 = 865.59 : x
2. Step 2: Convert to fraction form
   3,086.88/4,629.49 = 865.59/x
3. Step 3: Cross multiply
   3,086.88x = 4,629.49 × 865.59
4. Step 4: Simplify right side
   3,086.88x = 4,007,225.59
5. Step 5: Solve for x
   x = 4,007,225.59/3,086.88
6. Step 6: Final answer
   x = 1,298.15