Finding the Fourth Proportional to 1,012.02, 1,396.72 and 570.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.02 : 1,396.72 = 570.01 : x
2. Step 2: Convert to fraction form
   1,012.02/1,396.72 = 570.01/x
3. Step 3: Cross multiply
   1,012.02x = 1,396.72 × 570.01
4. Step 4: Simplify right side
   1,012.02x = 796,139.45
5. Step 5: Solve for x
   x = 796,139.45/1,012.02
6. Step 6: Final answer
   x = 786.68