Finding the Fourth Proportional to 8,406.72, 12,606.41 and 2,858.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,406.72 : 12,606.41 = 2,858.56 : x
2. Step 2: Convert to fraction form
   8,406.72/12,606.41 = 2,858.56/x
3. Step 3: Cross multiply
   8,406.72x = 12,606.41 × 2,858.56
4. Step 4: Simplify right side
   8,406.72x = 36,036,155.00
5. Step 5: Solve for x
   x = 36,036,155.00/8,406.72
6. Step 6: Final answer
   x = 4,286.59