Finding the Fourth Proportional to 1,014.17, 1,399.61 and 571.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.17 : 1,399.61 = 571.91 : x
2. Step 2: Convert to fraction form
   1,014.17/1,399.61 = 571.91/x
3. Step 3: Cross multiply
   1,014.17x = 1,399.61 × 571.91
4. Step 4: Simplify right side
   1,014.17x = 800,445.39
5. Step 5: Solve for x
   x = 800,445.39/1,014.17
6. Step 6: Final answer
   x = 789.27