Finding the Fourth Proportional to 1,008.86, 1,391.96 and 588.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.86 : 1,391.96 = 588.96 : x
2. Step 2: Convert to fraction form
   1,008.86/1,391.96 = 588.96/x
3. Step 3: Cross multiply
   1,008.86x = 1,391.96 × 588.96
4. Step 4: Simplify right side
   1,008.86x = 819,805.82
5. Step 5: Solve for x
   x = 819,805.82/1,008.86
6. Step 6: Final answer
   x = 812.61