Finding the Fourth Proportional to 3,222.61, 4,831.85 and 1,142.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,222.61 : 4,831.85 = 1,142.24 : x
2. Step 2: Convert to fraction form
   3,222.61/4,831.85 = 1,142.24/x
3. Step 3: Cross multiply
   3,222.61x = 4,831.85 × 1,142.24
4. Step 4: Simplify right side
   3,222.61x = 5,519,111.04
5. Step 5: Solve for x
   x = 5,519,111.04/3,222.61
6. Step 6: Final answer
   x = 1,712.62