Finding the Fourth Proportional to 3,570.80, 5,357.03 and 1,105.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,570.80 : 5,357.03 = 1,105.48 : x
2. Step 2: Convert to fraction form
   3,570.80/5,357.03 = 1,105.48/x
3. Step 3: Cross multiply
   3,570.80x = 5,357.03 × 1,105.48
4. Step 4: Simplify right side
   3,570.80x = 5,922,090.69
5. Step 5: Solve for x
   x = 5,922,090.69/3,570.80
6. Step 6: Final answer
   x = 1,658.48