Finding the Fourth Proportional to 10,647.92, 15,983.04 and 5,105.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,647.92 : 15,983.04 = 5,105.96 : x
2. Step 2: Convert to fraction form
   10,647.92/15,983.04 = 5,105.96/x
3. Step 3: Cross multiply
   10,647.92x = 15,983.04 × 5,105.96
4. Step 4: Simplify right side
   10,647.92x = 81,608,762.92
5. Step 5: Solve for x
   x = 81,608,762.92/10,647.92
6. Step 6: Final answer
   x = 7,664.29