Finding the Fourth Proportional to 10,964.43, 15,120.81 and 9,377.01

Step by Step Solution

1. Step 1: Write the proportion equation
   10,964.43 : 15,120.81 = 9,377.01 : x
2. Step 2: Convert to fraction form
   10,964.43/15,120.81 = 9,377.01/x
3. Step 3: Cross multiply
   10,964.43x = 15,120.81 × 9,377.01
4. Step 4: Simplify right side
   10,964.43x = 141,787,986.58
5. Step 5: Solve for x
   x = 141,787,986.58/10,964.43
6. Step 6: Final answer
   x = 12,931.63