Finding the Fourth Proportional to 1,059.71, 1,587.41 and 443.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.71 : 1,587.41 = 443.17 : x
2. Step 2: Convert to fraction form
   1,059.71/1,587.41 = 443.17/x
3. Step 3: Cross multiply
   1,059.71x = 1,587.41 × 443.17
4. Step 4: Simplify right side
   1,059.71x = 703,482.34
5. Step 5: Solve for x
   x = 703,482.34/1,059.71
6. Step 6: Final answer
   x = 663.84