Finding the Fourth Proportional to 1,060.31, 1,589.31 and 443.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.31 : 1,589.31 = 443.63 : x
2. Step 2: Convert to fraction form
   1,060.31/1,589.31 = 443.63/x
3. Step 3: Cross multiply
   1,060.31x = 1,589.31 × 443.63
4. Step 4: Simplify right side
   1,060.31x = 705,057.65
5. Step 5: Solve for x
   x = 705,057.65/1,060.31
6. Step 6: Final answer
   x = 664.96