Finding the Fourth Proportional to 1,018.09, 1,524.43 and 811.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.09 : 1,524.43 = 811.27 : x
2. Step 2: Convert to fraction form
   1,018.09/1,524.43 = 811.27/x
3. Step 3: Cross multiply
   1,018.09x = 1,524.43 × 811.27
4. Step 4: Simplify right side
   1,018.09x = 1,236,724.33
5. Step 5: Solve for x
   x = 1,236,724.33/1,018.09
6. Step 6: Final answer
   x = 1,214.75