Finding the Fourth Proportional to 8,929.49, 13,379.13 and 5,408.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,929.49 : 13,379.13 = 5,408.82 : x
2. Step 2: Convert to fraction form
   8,929.49/13,379.13 = 5,408.82/x
3. Step 3: Cross multiply
   8,929.49x = 13,379.13 × 5,408.82
4. Step 4: Simplify right side
   8,929.49x = 72,365,305.93
5. Step 5: Solve for x
   x = 72,365,305.93/8,929.49
6. Step 6: Final answer
   x = 8,104.09