Finding the Fourth Proportional to 1,084.28, 1,496.30 and 618.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.28 : 1,496.30 = 618.52 : x
2. Step 2: Convert to fraction form
   1,084.28/1,496.30 = 618.52/x
3. Step 3: Cross multiply
   1,084.28x = 1,496.30 × 618.52
4. Step 4: Simplify right side
   1,084.28x = 925,491.48
5. Step 5: Solve for x
   x = 925,491.48/1,084.28
6. Step 6: Final answer
   x = 853.55