Finding the Fourth Proportional to 8,551.05, 12,828 and 3,285.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,551.05 : 12,828 = 3,285.86 : x
2. Step 2: Convert to fraction form
   8,551.05/12,828 = 3,285.86/x
3. Step 3: Cross multiply
   8,551.05x = 12,828 × 3,285.86
4. Step 4: Simplify right side
   8,551.05x = 42,150,947.94
5. Step 5: Solve for x
   x = 42,150,947.94/8,551.05
6. Step 6: Final answer
   x = 4,929.33