Finding the Fourth Proportional to 6,864.72, 10,300.28 and 4,091.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,864.72 : 10,300.28 = 4,091.28 : x
2. Step 2: Convert to fraction form
   6,864.72/10,300.28 = 4,091.28/x
3. Step 3: Cross multiply
   6,864.72x = 10,300.28 × 4,091.28
4. Step 4: Simplify right side
   6,864.72x = 42,141,329.56
5. Step 5: Solve for x
   x = 42,141,329.56/6,864.72
6. Step 6: Final answer
   x = 6,138.83