Finding the Fourth Proportional to 6,863.76, 10,289.16 and 3,399.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,863.76 : 10,289.16 = 3,399.12 : x
2. Step 2: Convert to fraction form
   6,863.76/10,289.16 = 3,399.12/x
3. Step 3: Cross multiply
   6,863.76x = 10,289.16 × 3,399.12
4. Step 4: Simplify right side
   6,863.76x = 34,974,089.54
5. Step 5: Solve for x
   x = 34,974,089.54/6,863.76
6. Step 6: Final answer
   x = 5,095.47