Finding the Fourth Proportional to 7,831.89, 11,743.57 and 3,610.57

Step by Step Solution

1. Step 1: Write the proportion equation
   7,831.89 : 11,743.57 = 3,610.57 : x
2. Step 2: Convert to fraction form
   7,831.89/11,743.57 = 3,610.57/x
3. Step 3: Cross multiply
   7,831.89x = 11,743.57 × 3,610.57
4. Step 4: Simplify right side
   7,831.89x = 42,400,981.53
5. Step 5: Solve for x
   x = 42,400,981.53/7,831.89
6. Step 6: Final answer
   x = 5,413.89