Finding the Fourth Proportional to 1,084.76, 1,496.56 and 618.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.76 : 1,496.56 = 618.76 : x
2. Step 2: Convert to fraction form
   1,084.76/1,496.56 = 618.76/x
3. Step 3: Cross multiply
   1,084.76x = 1,496.56 × 618.76
4. Step 4: Simplify right side
   1,084.76x = 926,011.47
5. Step 5: Solve for x
   x = 926,011.47/1,084.76
6. Step 6: Final answer
   x = 853.66