Finding the Fourth Proportional to 10,864.80, 14,993.69 and 6,388.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,864.80 : 14,993.69 = 6,388.79 : x
2. Step 2: Convert to fraction form
   10,864.80/14,993.69 = 6,388.79/x
3. Step 3: Cross multiply
   10,864.80x = 14,993.69 × 6,388.79
4. Step 4: Simplify right side
   10,864.80x = 95,791,429.82
5. Step 5: Solve for x
   x = 95,791,429.82/10,864.80
6. Step 6: Final answer
   x = 8,816.68