Finding the Fourth Proportional to 1,086.85, 1,499.78 and 608.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.85 : 1,499.78 = 608.27 : x
2. Step 2: Convert to fraction form
   1,086.85/1,499.78 = 608.27/x
3. Step 3: Cross multiply
   1,086.85x = 1,499.78 × 608.27
4. Step 4: Simplify right side
   1,086.85x = 912,271.18
5. Step 5: Solve for x
   x = 912,271.18/1,086.85
6. Step 6: Final answer
   x = 839.37