Finding the Fourth Proportional to 2,081.94, 2,872.84 and 1,285.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.94 : 2,872.84 = 1,285.12 : x
2. Step 2: Convert to fraction form
   2,081.94/2,872.84 = 1,285.12/x
3. Step 3: Cross multiply
   2,081.94x = 2,872.84 × 1,285.12
4. Step 4: Simplify right side
   2,081.94x = 3,691,944.14
5. Step 5: Solve for x
   x = 3,691,944.14/2,081.94
6. Step 6: Final answer
   x = 1,773.32