Finding the Fourth Proportional to 1,086.21, 1,499.38 and 713.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.21 : 1,499.38 = 713.27 : x
2. Step 2: Convert to fraction form
   1,086.21/1,499.38 = 713.27/x
3. Step 3: Cross multiply
   1,086.21x = 1,499.38 × 713.27
4. Step 4: Simplify right side
   1,086.21x = 1,069,464.74
5. Step 5: Solve for x
   x = 1,069,464.74/1,086.21
6. Step 6: Final answer
   x = 984.58