Finding the Fourth Proportional to 1,012.50, 1,397.16 and 570.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.50 : 1,397.16 = 570.33 : x
2. Step 2: Convert to fraction form
   1,012.50/1,397.16 = 570.33/x
3. Step 3: Cross multiply
   1,012.50x = 1,397.16 × 570.33
4. Step 4: Simplify right side
   1,012.50x = 796,842.26
5. Step 5: Solve for x
   x = 796,842.26/1,012.50
6. Step 6: Final answer
   x = 787.00