Finding the Fourth Proportional to 1,014.39, 1,399.72 and 572.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.39 : 1,399.72 = 572.26 : x
2. Step 2: Convert to fraction form
   1,014.39/1,399.72 = 572.26/x
3. Step 3: Cross multiply
   1,014.39x = 1,399.72 × 572.26
4. Step 4: Simplify right side
   1,014.39x = 801,003.77
5. Step 5: Solve for x
   x = 801,003.77/1,014.39
6. Step 6: Final answer
   x = 789.64