Finding the Fourth Proportional to 2,856.84, 4,285.57 and 908.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.84 : 4,285.57 = 908.59 : x
2. Step 2: Convert to fraction form
   2,856.84/4,285.57 = 908.59/x
3. Step 3: Cross multiply
   2,856.84x = 4,285.57 × 908.59
4. Step 4: Simplify right side
   2,856.84x = 3,893,804.62
5. Step 5: Solve for x
   x = 3,893,804.62/2,856.84
6. Step 6: Final answer
   x = 1,362.98