Finding the Fourth Proportional to 3,783.50, 5,671.04 and 2,856.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,783.50 : 5,671.04 = 2,856.05 : x
2. Step 2: Convert to fraction form
   3,783.50/5,671.04 = 2,856.05/x
3. Step 3: Cross multiply
   3,783.50x = 5,671.04 × 2,856.05
4. Step 4: Simplify right side
   3,783.50x = 16,196,773.79
5. Step 5: Solve for x
   x = 16,196,773.79/3,783.50
6. Step 6: Final answer
   x = 4,280.90