Finding the Fourth Proportional to 1,012.52, 1,397.32 and 570.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.52 : 1,397.32 = 570.44 : x
2. Step 2: Convert to fraction form
   1,012.52/1,397.32 = 570.44/x
3. Step 3: Cross multiply
   1,012.52x = 1,397.32 × 570.44
4. Step 4: Simplify right side
   1,012.52x = 797,078.81
5. Step 5: Solve for x
   x = 797,078.81/1,012.52
6. Step 6: Final answer
   x = 787.23