Finding the Fourth Proportional to 2,856.09, 4,284.15 and 908.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.09 : 4,284.15 = 908.30 : x
2. Step 2: Convert to fraction form
   2,856.09/4,284.15 = 908.30/x
3. Step 3: Cross multiply
   2,856.09x = 4,284.15 × 908.30
4. Step 4: Simplify right side
   2,856.09x = 3,891,300.75
5. Step 5: Solve for x
   x = 3,891,300.75/2,856.09
6. Step 6: Final answer
   x = 1,362.46