Finding the Fourth Proportional to 3,185.42, 4,779.35 and 1,105.65

Step by Step Solution

1. Step 1: Write the proportion equation
   3,185.42 : 4,779.35 = 1,105.65 : x
2. Step 2: Convert to fraction form
   3,185.42/4,779.35 = 1,105.65/x
3. Step 3: Cross multiply
   3,185.42x = 4,779.35 × 1,105.65
4. Step 4: Simplify right side
   3,185.42x = 5,284,258.90
5. Step 5: Solve for x
   x = 5,284,258.90/3,185.42
6. Step 6: Final answer
   x = 1,658.89