Finding the Fourth Proportional to 4,550.69, 6,831.50 and 3,085.40

Step by Step Solution

1. Step 1: Write the proportion equation
   4,550.69 : 6,831.50 = 3,085.40 : x
2. Step 2: Convert to fraction form
   4,550.69/6,831.50 = 3,085.40/x
3. Step 3: Cross multiply
   4,550.69x = 6,831.50 × 3,085.40
4. Step 4: Simplify right side
   4,550.69x = 21,077,860.52
5. Step 5: Solve for x
   x = 21,077,860.52/4,550.69
6. Step 6: Final answer
   x = 4,631.80