Finding the Fourth Proportional to 1,012.37, 1,396.81 and 570.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.37 : 1,396.81 = 570.17 : x
2. Step 2: Convert to fraction form
   1,012.37/1,396.81 = 570.17/x
3. Step 3: Cross multiply
   1,012.37x = 1,396.81 × 570.17
4. Step 4: Simplify right side
   1,012.37x = 796,423.36
5. Step 5: Solve for x
   x = 796,423.36/1,012.37
6. Step 6: Final answer
   x = 786.70