Finding the Fourth Proportional to 3,784.06, 5,671.89 and 2,856.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,784.06 : 5,671.89 = 2,856.61 : x
2. Step 2: Convert to fraction form
   3,784.06/5,671.89 = 2,856.61/x
3. Step 3: Cross multiply
   3,784.06x = 5,671.89 × 2,856.61
4. Step 4: Simplify right side
   3,784.06x = 16,202,377.69
5. Step 5: Solve for x
   x = 16,202,377.69/3,784.06
6. Step 6: Final answer
   x = 4,281.74