Finding the Fourth Proportional to 1,058.27, 1,587.56 and 327.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,058.27 : 1,587.56 = 327.96 : x
2. Step 2: Convert to fraction form
   1,058.27/1,587.56 = 327.96/x
3. Step 3: Cross multiply
   1,058.27x = 1,587.56 × 327.96
4. Step 4: Simplify right side
   1,058.27x = 520,654.54
5. Step 5: Solve for x
   x = 520,654.54/1,058.27
6. Step 6: Final answer
   x = 491.99