Finding the Fourth Proportional to 3,570.80, 5,356.71 and 1,105.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,570.80 : 5,356.71 = 1,105.83 : x
2. Step 2: Convert to fraction form
   3,570.80/5,356.71 = 1,105.83/x
3. Step 3: Cross multiply
   3,570.80x = 5,356.71 × 1,105.83
4. Step 4: Simplify right side
   3,570.80x = 5,923,610.62
5. Step 5: Solve for x
   x = 5,923,610.62/3,570.80
6. Step 6: Final answer
   x = 1,658.90