Finding the Fourth Proportional to 2,831.78, 3,925.75 and 2,681.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,831.78 : 3,925.75 = 2,681.83 : x
2. Step 2: Convert to fraction form
   2,831.78/3,925.75 = 2,681.83/x
3. Step 3: Cross multiply
   2,831.78x = 3,925.75 × 2,681.83
4. Step 4: Simplify right side
   2,831.78x = 10,528,175.27
5. Step 5: Solve for x
   x = 10,528,175.27/2,831.78
6. Step 6: Final answer
   x = 3,717.87