Finding the Fourth Proportional to 12,928.24, 17,829.72 and 9,936.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,928.24 : 17,829.72 = 9,936.88 : x
2. Step 2: Convert to fraction form
   12,928.24/17,829.72 = 9,936.88/x
3. Step 3: Cross multiply
   12,928.24x = 17,829.72 × 9,936.88
4. Step 4: Simplify right side
   12,928.24x = 177,171,788.07
5. Step 5: Solve for x
   x = 177,171,788.07/12,928.24
6. Step 6: Final answer
   x = 13,704.25