Finding the Fourth Proportional to 3,447.12, 5,168.16 and 1,105.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,447.12 : 5,168.16 = 1,105.79 : x
2. Step 2: Convert to fraction form
   3,447.12/5,168.16 = 1,105.79/x
3. Step 3: Cross multiply
   3,447.12x = 5,168.16 × 1,105.79
4. Step 4: Simplify right side
   3,447.12x = 5,714,899.65
5. Step 5: Solve for x
   x = 5,714,899.65/3,447.12
6. Step 6: Final answer
   x = 1,657.88