Finding the Fourth Proportional to 19,408.72, 29,112.16 and 5,557.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,408.72 : 29,112.16 = 5,557.72 : x
2. Step 2: Convert to fraction form
   19,408.72/29,112.16 = 5,557.72/x
3. Step 3: Cross multiply
   19,408.72x = 29,112.16 × 5,557.72
4. Step 4: Simplify right side
   19,408.72x = 161,797,233.88
5. Step 5: Solve for x
   x = 161,797,233.88/19,408.72
6. Step 6: Final answer
   x = 8,336.32