Finding the Fourth Proportional to 6,864.72, 10,289.12 and 3,159.17

Step by Step Solution

1. Step 1: Write the proportion equation
   6,864.72 : 10,289.12 = 3,159.17 : x
2. Step 2: Convert to fraction form
   6,864.72/10,289.12 = 3,159.17/x
3. Step 3: Cross multiply
   6,864.72x = 10,289.12 × 3,159.17
4. Step 4: Simplify right side
   6,864.72x = 32,505,079.23
5. Step 5: Solve for x
   x = 32,505,079.23/6,864.72
6. Step 6: Final answer
   x = 4,735.09