Finding the Fourth Proportional to 1,057.59, 1,585.98 and 441.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.59 : 1,585.98 = 441.32 : x
2. Step 2: Convert to fraction form
   1,057.59/1,585.98 = 441.32/x
3. Step 3: Cross multiply
   1,057.59x = 1,585.98 × 441.32
4. Step 4: Simplify right side
   1,057.59x = 699,916.76
5. Step 5: Solve for x
   x = 699,916.76/1,057.59
6. Step 6: Final answer
   x = 661.80