Finding the Fourth Proportional to 1,084.16, 1,496.17 and 618.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.16 : 1,496.17 = 618.38 : x
2. Step 2: Convert to fraction form
   1,084.16/1,496.17 = 618.38/x
3. Step 3: Cross multiply
   1,084.16x = 1,496.17 × 618.38
4. Step 4: Simplify right side
   1,084.16x = 925,192.58
5. Step 5: Solve for x
   x = 925,192.58/1,084.16
6. Step 6: Final answer
   x = 853.38