Finding the Fourth Proportional to 12,396.36, 17,105.79 and 7,359.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,396.36 : 17,105.79 = 7,359.72 : x
2. Step 2: Convert to fraction form
   12,396.36/17,105.79 = 7,359.72/x
3. Step 3: Cross multiply
   12,396.36x = 17,105.79 × 7,359.72
4. Step 4: Simplify right side
   12,396.36x = 125,893,824.78
5. Step 5: Solve for x
   x = 125,893,824.78/12,396.36
6. Step 6: Final answer
   x = 10,155.71