Finding the Fourth Proportional to 1,086.96, 1,499.04 and 853.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.96 : 1,499.04 = 853.68 : x
2. Step 2: Convert to fraction form
   1,086.96/1,499.04 = 853.68/x
3. Step 3: Cross multiply
   1,086.96x = 1,499.04 × 853.68
4. Step 4: Simplify right side
   1,086.96x = 1,279,700.47
5. Step 5: Solve for x
   x = 1,279,700.47/1,086.96
6. Step 6: Final answer
   x = 1,177.32