Finding the Fourth Proportional to 3,831.57, 5,285.39 and 2,650.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831.57 : 5,285.39 = 2,650.59 : x
2. Step 2: Convert to fraction form
   3,831.57/5,285.39 = 2,650.59/x
3. Step 3: Cross multiply
   3,831.57x = 5,285.39 × 2,650.59
4. Step 4: Simplify right side
   3,831.57x = 14,009,388.63
5. Step 5: Solve for x
   x = 14,009,388.63/3,831.57
6. Step 6: Final answer
   x = 3,656.31