Finding the Fourth Proportional to 8,428.07, 12,643.72 and 3,233.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,428.07 : 12,643.72 = 3,233.54 : x
2. Step 2: Convert to fraction form
   8,428.07/12,643.72 = 3,233.54/x
3. Step 3: Cross multiply
   8,428.07x = 12,643.72 × 3,233.54
4. Step 4: Simplify right side
   8,428.07x = 40,883,997.89
5. Step 5: Solve for x
   x = 40,883,997.89/8,428.07
6. Step 6: Final answer
   x = 4,850.93