Finding the Fourth Proportional to 12,936.24, 19,410.96 and 5,538.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,936.24 : 19,410.96 = 5,538.72 : x
2. Step 2: Convert to fraction form
   12,936.24/19,410.96 = 5,538.72/x
3. Step 3: Cross multiply
   12,936.24x = 19,410.96 × 5,538.72
4. Step 4: Simplify right side
   12,936.24x = 107,511,872.37
5. Step 5: Solve for x
   x = 107,511,872.37/12,936.24
6. Step 6: Final answer
   x = 8,310.91