Finding the Fourth Proportional to 1,083.88, 1,495.78 and 618.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.88 : 1,495.78 = 618.12 : x
2. Step 2: Convert to fraction form
   1,083.88/1,495.78 = 618.12/x
3. Step 3: Cross multiply
   1,083.88x = 1,495.78 × 618.12
4. Step 4: Simplify right side
   1,083.88x = 924,571.53
5. Step 5: Solve for x
   x = 924,571.53/1,083.88
6. Step 6: Final answer
   x = 853.02