Finding the Fourth Proportional to 3,570.81, 5,356.32 and 1,105.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,570.81 : 5,356.32 = 1,105.71 : x
2. Step 2: Convert to fraction form
   3,570.81/5,356.32 = 1,105.71/x
3. Step 3: Cross multiply
   3,570.81x = 5,356.32 × 1,105.71
4. Step 4: Simplify right side
   3,570.81x = 5,922,536.59
5. Step 5: Solve for x
   x = 5,922,536.59/3,570.81
6. Step 6: Final answer
   x = 1,658.60