Finding the Fourth Proportional to 7,223.78, 10,831.56 and 2,838.84

Step by Step Solution

1. Step 1: Write the proportion equation
   7,223.78 : 10,831.56 = 2,838.84 : x
2. Step 2: Convert to fraction form
   7,223.78/10,831.56 = 2,838.84/x
3. Step 3: Cross multiply
   7,223.78x = 10,831.56 × 2,838.84
4. Step 4: Simplify right side
   7,223.78x = 30,749,065.79
5. Step 5: Solve for x
   x = 30,749,065.79/7,223.78
6. Step 6: Final answer
   x = 4,256.65