Finding the Fourth Proportional to 1,012.93, 1,397.83 and 570.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.93 : 1,397.83 = 570.84 : x
2. Step 2: Convert to fraction form
   1,012.93/1,397.83 = 570.84/x
3. Step 3: Cross multiply
   1,012.93x = 1,397.83 × 570.84
4. Step 4: Simplify right side
   1,012.93x = 797,937.28
5. Step 5: Solve for x
   x = 797,937.28/1,012.93
6. Step 6: Final answer
   x = 787.75