Finding the Fourth Proportional to 3,570.30, 5,355.58 and 1,105.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,570.30 : 5,355.58 = 1,105.20 : x
2. Step 2: Convert to fraction form
   3,570.30/5,355.58 = 1,105.20/x
3. Step 3: Cross multiply
   3,570.30x = 5,355.58 × 1,105.20
4. Step 4: Simplify right side
   3,570.30x = 5,918,987.02
5. Step 5: Solve for x
   x = 5,918,987.02/3,570.30
6. Step 6: Final answer
   x = 1,657.84