Finding the Fourth Proportional to 11,105.68, 15,304.74 and 7,956.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,105.68 : 15,304.74 = 7,956.40 : x
2. Step 2: Convert to fraction form
   11,105.68/15,304.74 = 7,956.40/x
3. Step 3: Cross multiply
   11,105.68x = 15,304.74 × 7,956.40
4. Step 4: Simplify right side
   11,105.68x = 121,770,633.34
5. Step 5: Solve for x
   x = 121,770,633.34/11,105.68
6. Step 6: Final answer
   x = 10,964.72