Finding the Fourth Proportional to 10,440.65, 14,399.72 and 9,179.03

Step by Step Solution

1. Step 1: Write the proportion equation
   10,440.65 : 14,399.72 = 9,179.03 : x
2. Step 2: Convert to fraction form
   10,440.65/14,399.72 = 9,179.03/x
3. Step 3: Cross multiply
   10,440.65x = 14,399.72 × 9,179.03
4. Step 4: Simplify right side
   10,440.65x = 132,175,343.98
5. Step 5: Solve for x
   x = 132,175,343.98/10,440.65
6. Step 6: Final answer
   x = 12,659.69