Finding the Fourth Proportional to 1,013.06, 1,397.88 and 570.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.06 : 1,397.88 = 570.94 : x
2. Step 2: Convert to fraction form
   1,013.06/1,397.88 = 570.94/x
3. Step 3: Cross multiply
   1,013.06x = 1,397.88 × 570.94
4. Step 4: Simplify right side
   1,013.06x = 798,105.61
5. Step 5: Solve for x
   x = 798,105.61/1,013.06
6. Step 6: Final answer
   x = 787.82