Finding the Fourth Proportional to 1,093.94, 1,640.91 and 443.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,093.94 : 1,640.91 = 443.96 : x
2. Step 2: Convert to fraction form
   1,093.94/1,640.91 = 443.96/x
3. Step 3: Cross multiply
   1,093.94x = 1,640.91 × 443.96
4. Step 4: Simplify right side
   1,093.94x = 728,498.40
5. Step 5: Solve for x
   x = 728,498.40/1,093.94
6. Step 6: Final answer
   x = 665.94