Finding the Fourth Proportional to 2,856.78, 4,259.13 and 2,784.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.78 : 4,259.13 = 2,784.96 : x
2. Step 2: Convert to fraction form
   2,856.78/4,259.13 = 2,784.96/x
3. Step 3: Cross multiply
   2,856.78x = 4,259.13 × 2,784.96
4. Step 4: Simplify right side
   2,856.78x = 11,861,506.68
5. Step 5: Solve for x
   x = 11,861,506.68/2,856.78
6. Step 6: Final answer
   x = 4,152.05