Finding the Fourth Proportional to 12,936.44, 19,408.23 and 5,150.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,936.44 : 19,408.23 = 5,150.72 : x
2. Step 2: Convert to fraction form
   12,936.44/19,408.23 = 5,150.72/x
3. Step 3: Cross multiply
   12,936.44x = 19,408.23 × 5,150.72
4. Step 4: Simplify right side
   12,936.44x = 99,966,358.43
5. Step 5: Solve for x
   x = 99,966,358.43/12,936.44
6. Step 6: Final answer
   x = 7,727.50