Finding the Fourth Proportional to 10,956.74, 15,105.56 and 7,173.36

Step by Step Solution

1. Step 1: Write the proportion equation
   10,956.74 : 15,105.56 = 7,173.36 : x
2. Step 2: Convert to fraction form
   10,956.74/15,105.56 = 7,173.36/x
3. Step 3: Cross multiply
   10,956.74x = 15,105.56 × 7,173.36
4. Step 4: Simplify right side
   10,956.74x = 108,357,584.01
5. Step 5: Solve for x
   x = 108,357,584.01/10,956.74
6. Step 6: Final answer
   x = 9,889.59