Finding the Fourth Proportional to 12,408.72, 17,124.84 and 7,104.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,408.72 : 17,124.84 = 7,104.24 : x
2. Step 2: Convert to fraction form
   12,408.72/17,124.84 = 7,104.24/x
3. Step 3: Cross multiply
   12,408.72x = 17,124.84 × 7,104.24
4. Step 4: Simplify right side
   12,408.72x = 121,658,973.32
5. Step 5: Solve for x
   x = 121,658,973.32/12,408.72
6. Step 6: Final answer
   x = 9,804.31