Finding the Fourth Proportional to 8,572.83, 12,857.45 and 3,306.03

Step by Step Solution

1. Step 1: Write the proportion equation
   8,572.83 : 12,857.45 = 3,306.03 : x
2. Step 2: Convert to fraction form
   8,572.83/12,857.45 = 3,306.03/x
3. Step 3: Cross multiply
   8,572.83x = 12,857.45 × 3,306.03
4. Step 4: Simplify right side
   8,572.83x = 42,507,098.89
5. Step 5: Solve for x
   x = 42,507,098.89/8,572.83
6. Step 6: Final answer
   x = 4,958.35