Finding the Fourth Proportional to 8,721.72, 12,035.61 and 4,945.14

Step by Step Solution

1. Step 1: Write the proportion equation
   8,721.72 : 12,035.61 = 4,945.14 : x
2. Step 2: Convert to fraction form
   8,721.72/12,035.61 = 4,945.14/x
3. Step 3: Cross multiply
   8,721.72x = 12,035.61 × 4,945.14
4. Step 4: Simplify right side
   8,721.72x = 59,517,757.54
5. Step 5: Solve for x
   x = 59,517,757.54/8,721.72
6. Step 6: Final answer
   x = 6,824.09