Finding the Fourth Proportional to 1,137.61, 1,705.71 and 443.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137.61 : 1,705.71 = 443.46 : x
2. Step 2: Convert to fraction form
   1,137.61/1,705.71 = 443.46/x
3. Step 3: Cross multiply
   1,137.61x = 1,705.71 × 443.46
4. Step 4: Simplify right side
   1,137.61x = 756,414.16
5. Step 5: Solve for x
   x = 756,414.16/1,137.61
6. Step 6: Final answer
   x = 664.92