Finding the Fourth Proportional to 1,012.37, 1,396.98 and 570.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.37 : 1,396.98 = 570.38 : x
2. Step 2: Convert to fraction form
   1,012.37/1,396.98 = 570.38/x
3. Step 3: Cross multiply
   1,012.37x = 1,396.98 × 570.38
4. Step 4: Simplify right side
   1,012.37x = 796,802.47
5. Step 5: Solve for x
   x = 796,802.47/1,012.37
6. Step 6: Final answer
   x = 787.07