Finding the Fourth Proportional to 3,413.50, 5,121.06 and 1,105

Step by Step Solution

1. Step 1: Write the proportion equation
   3,413.50 : 5,121.06 = 1,105 : x
2. Step 2: Convert to fraction form
   3,413.50/5,121.06 = 1,105/x
3. Step 3: Cross multiply
   3,413.50x = 5,121.06 × 1,105
4. Step 4: Simplify right side
   3,413.50x = 5,658,771.30
5. Step 5: Solve for x
   x = 5,658,771.30/3,413.50
6. Step 6: Final answer
   x = 1,657.76