Finding the Fourth Proportional to 1,061.27, 1,591.64 and 403.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.27 : 1,591.64 = 403.21 : x
2. Step 2: Convert to fraction form
   1,061.27/1,591.64 = 403.21/x
3. Step 3: Cross multiply
   1,061.27x = 1,591.64 × 403.21
4. Step 4: Simplify right side
   1,061.27x = 641,765.16
5. Step 5: Solve for x
   x = 641,765.16/1,061.27
6. Step 6: Final answer
   x = 604.71