Finding the Fourth Proportional to 1,084.18, 1,496.16 and 618.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.18 : 1,496.16 = 618.42 : x
2. Step 2: Convert to fraction form
   1,084.18/1,496.16 = 618.42/x
3. Step 3: Cross multiply
   1,084.18x = 1,496.16 × 618.42
4. Step 4: Simplify right side
   1,084.18x = 925,255.27
5. Step 5: Solve for x
   x = 925,255.27/1,084.18
6. Step 6: Final answer
   x = 853.41