Finding the Fourth Proportional to 2,831.17, 4,245.38 and 1,187.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,831.17 : 4,245.38 = 1,187.27 : x
2. Step 2: Convert to fraction form
   2,831.17/4,245.38 = 1,187.27/x
3. Step 3: Cross multiply
   2,831.17x = 4,245.38 × 1,187.27
4. Step 4: Simplify right side
   2,831.17x = 5,040,419.96
5. Step 5: Solve for x
   x = 5,040,419.96/2,831.17
6. Step 6: Final answer
   x = 1,780.33