Finding the Fourth Proportional to 1,012.42, 1,397.11 and 570.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.42 : 1,397.11 = 570.29 : x
2. Step 2: Convert to fraction form
   1,012.42/1,397.11 = 570.29/x
3. Step 3: Cross multiply
   1,012.42x = 1,397.11 × 570.29
4. Step 4: Simplify right side
   1,012.42x = 796,755.01
5. Step 5: Solve for x
   x = 796,755.01/1,012.42
6. Step 6: Final answer
   x = 786.98