Finding the Fourth Proportional to 2,831.09, 4,248.03 and 1,272.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,831.09 : 4,248.03 = 1,272.17 : x
2. Step 2: Convert to fraction form
   2,831.09/4,248.03 = 1,272.17/x
3. Step 3: Cross multiply
   2,831.09x = 4,248.03 × 1,272.17
4. Step 4: Simplify right side
   2,831.09x = 5,404,216.33
5. Step 5: Solve for x
   x = 5,404,216.33/2,831.09
6. Step 6: Final answer
   x = 1,908.88