Finding the Fourth Proportional to 1,003.94, 1,504.28 and 618.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.94 : 1,504.28 = 618.38 : x
2. Step 2: Convert to fraction form
   1,003.94/1,504.28 = 618.38/x
3. Step 3: Cross multiply
   1,003.94x = 1,504.28 × 618.38
4. Step 4: Simplify right side
   1,003.94x = 930,210.69
5. Step 5: Solve for x
   x = 930,210.69/1,003.94
6. Step 6: Final answer
   x = 926.56