Finding the Fourth Proportional to 1,086.85, 1,499.85 and 589.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.85 : 1,499.85 = 589.49 : x
2. Step 2: Convert to fraction form
   1,086.85/1,499.85 = 589.49/x
3. Step 3: Cross multiply
   1,086.85x = 1,499.85 × 589.49
4. Step 4: Simplify right side
   1,086.85x = 884,140.48
5. Step 5: Solve for x
   x = 884,140.48/1,086.85
6. Step 6: Final answer
   x = 813.49