Finding the Fourth Proportional to 1,086.75, 1,499.72 and 589.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.75 : 1,499.72 = 589.39 : x
2. Step 2: Convert to fraction form
   1,086.75/1,499.72 = 589.39/x
3. Step 3: Cross multiply
   1,086.75x = 1,499.72 × 589.39
4. Step 4: Simplify right side
   1,086.75x = 883,913.27
5. Step 5: Solve for x
   x = 883,913.27/1,086.75
6. Step 6: Final answer
   x = 813.35