Finding the Fourth Proportional to 2,086.12, 3,130.33 and 854.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.12 : 3,130.33 = 854.39 : x
2. Step 2: Convert to fraction form
   2,086.12/3,130.33 = 854.39/x
3. Step 3: Cross multiply
   2,086.12x = 3,130.33 × 854.39
4. Step 4: Simplify right side
   2,086.12x = 2,674,518.73
5. Step 5: Solve for x
   x = 2,674,518.73/2,086.12
6. Step 6: Final answer
   x = 1,282.06