Finding the Fourth Proportional to 1,012.27, 1,397.13 and 570.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.27 : 1,397.13 = 570.18 : x
2. Step 2: Convert to fraction form
   1,012.27/1,397.13 = 570.18/x
3. Step 3: Cross multiply
   1,012.27x = 1,397.13 × 570.18
4. Step 4: Simplify right side
   1,012.27x = 796,615.58
5. Step 5: Solve for x
   x = 796,615.58/1,012.27
6. Step 6: Final answer
   x = 786.96