Finding the Fourth Proportional to 1,084.38, 1,496.46 and 618.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.38 : 1,496.46 = 618.63 : x
2. Step 2: Convert to fraction form
   1,084.38/1,496.46 = 618.63/x
3. Step 3: Cross multiply
   1,084.38x = 1,496.46 × 618.63
4. Step 4: Simplify right side
   1,084.38x = 925,755.05
5. Step 5: Solve for x
   x = 925,755.05/1,084.38
6. Step 6: Final answer
   x = 853.72