Finding the Fourth Proportional to 1,084.22, 1,496.24 and 618.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.22 : 1,496.24 = 618.47 : x
2. Step 2: Convert to fraction form
   1,084.22/1,496.24 = 618.47/x
3. Step 3: Cross multiply
   1,084.22x = 1,496.24 × 618.47
4. Step 4: Simplify right side
   1,084.22x = 925,376.91
5. Step 5: Solve for x
   x = 925,376.91/1,084.22
6. Step 6: Final answer
   x = 853.50