Finding the Fourth Proportional to 1,091.82, 1,637.97 and 443.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.82 : 1,637.97 = 443.10 : x
2. Step 2: Convert to fraction form
   1,091.82/1,637.97 = 443.10/x
3. Step 3: Cross multiply
   1,091.82x = 1,637.97 × 443.10
4. Step 4: Simplify right side
   1,091.82x = 725,784.51
5. Step 5: Solve for x
   x = 725,784.51/1,091.82
6. Step 6: Final answer
   x = 664.75