Finding the Fourth Proportional to 1,105.69, 1,657.59 and 447.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.69 : 1,657.59 = 447.16 : x
2. Step 2: Convert to fraction form
   1,105.69/1,657.59 = 447.16/x
3. Step 3: Cross multiply
   1,105.69x = 1,657.59 × 447.16
4. Step 4: Simplify right side
   1,105.69x = 741,207.94
5. Step 5: Solve for x
   x = 741,207.94/1,105.69
6. Step 6: Final answer
   x = 670.36