Finding the Fourth Proportional to 7,272.72, 10,914.51 and 2,831.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,272.72 : 10,914.51 = 2,831.09 : x
2. Step 2: Convert to fraction form
   7,272.72/10,914.51 = 2,831.09/x
3. Step 3: Cross multiply
   7,272.72x = 10,914.51 × 2,831.09
4. Step 4: Simplify right side
   7,272.72x = 30,899,905.54
5. Step 5: Solve for x
   x = 30,899,905.54/7,272.72
6. Step 6: Final answer
   x = 4,248.74