Finding the Fourth Proportional to 1,014.18, 1,399.56 and 572.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.18 : 1,399.56 = 572.16 : x
2. Step 2: Convert to fraction form
   1,014.18/1,399.56 = 572.16/x
3. Step 3: Cross multiply
   1,014.18x = 1,399.56 × 572.16
4. Step 4: Simplify right side
   1,014.18x = 800,772.25
5. Step 5: Solve for x
   x = 800,772.25/1,014.18
6. Step 6: Final answer
   x = 789.58