Finding the Fourth Proportional to 2,276.06, 3,413.81 and 1,105.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.06 : 3,413.81 = 1,105.20 : x
2. Step 2: Convert to fraction form
   2,276.06/3,413.81 = 1,105.20/x
3. Step 3: Cross multiply
   2,276.06x = 3,413.81 × 1,105.20
4. Step 4: Simplify right side
   2,276.06x = 3,772,945.58
5. Step 5: Solve for x
   x = 3,772,945.58/2,276.06
6. Step 6: Final answer
   x = 1,657.67