Finding the Fourth Proportional to 1,012.03, 1,396.71 and 618.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.03 : 1,396.71 = 618.82 : x
2. Step 2: Convert to fraction form
   1,012.03/1,396.71 = 618.82/x
3. Step 3: Cross multiply
   1,012.03x = 1,396.71 × 618.82
4. Step 4: Simplify right side
   1,012.03x = 864,308.59
5. Step 5: Solve for x
   x = 864,308.59/1,012.03
6. Step 6: Final answer
   x = 854.04