Finding the Fourth Proportional to 1,093.33, 1,638.55 and 443.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,093.33 : 1,638.55 = 443.71 : x
2. Step 2: Convert to fraction form
   1,093.33/1,638.55 = 443.71/x
3. Step 3: Cross multiply
   1,093.33x = 1,638.55 × 443.71
4. Step 4: Simplify right side
   1,093.33x = 727,041.02
5. Step 5: Solve for x
   x = 727,041.02/1,093.33
6. Step 6: Final answer
   x = 664.98