Finding the Fourth Proportional to 1,014.24, 1,399.71 and 572.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.24 : 1,399.71 = 572.28 : x
2. Step 2: Convert to fraction form
   1,014.24/1,399.71 = 572.28/x
3. Step 3: Cross multiply
   1,014.24x = 1,399.71 × 572.28
4. Step 4: Simplify right side
   1,014.24x = 801,026.04
5. Step 5: Solve for x
   x = 801,026.04/1,014.24
6. Step 6: Final answer
   x = 789.78