Finding the Fourth Proportional to 1,008.10, 1,391.34 and 588.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.10 : 1,391.34 = 588.52 : x
2. Step 2: Convert to fraction form
   1,008.10/1,391.34 = 588.52/x
3. Step 3: Cross multiply
   1,008.10x = 1,391.34 × 588.52
4. Step 4: Simplify right side
   1,008.10x = 818,831.42
5. Step 5: Solve for x
   x = 818,831.42/1,008.10
6. Step 6: Final answer
   x = 812.25