Finding the Fourth Proportional to 1,059.46, 1,589.29 and 443.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.46 : 1,589.29 = 443.35 : x
2. Step 2: Convert to fraction form
   1,059.46/1,589.29 = 443.35/x
3. Step 3: Cross multiply
   1,059.46x = 1,589.29 × 443.35
4. Step 4: Simplify right side
   1,059.46x = 704,611.72
5. Step 5: Solve for x
   x = 704,611.72/1,059.46
6. Step 6: Final answer
   x = 665.07