Finding the Fourth Proportional to 1,008.27, 1,391.18 and 588.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.27 : 1,391.18 = 588.56 : x
2. Step 2: Convert to fraction form
   1,008.27/1,391.18 = 588.56/x
3. Step 3: Cross multiply
   1,008.27x = 1,391.18 × 588.56
4. Step 4: Simplify right side
   1,008.27x = 818,783.00
5. Step 5: Solve for x
   x = 818,783.00/1,008.27
6. Step 6: Final answer
   x = 812.07