Finding the Fourth Proportional to 1,350.18, 1,863.74 and 853.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,350.18 : 1,863.74 = 853.15 : x
2. Step 2: Convert to fraction form
   1,350.18/1,863.74 = 853.15/x
3. Step 3: Cross multiply
   1,350.18x = 1,863.74 × 853.15
4. Step 4: Simplify right side
   1,350.18x = 1,590,049.78
5. Step 5: Solve for x
   x = 1,590,049.78/1,350.18
6. Step 6: Final answer
   x = 1,177.66