Finding the Fourth Proportional to 12,429.32, 17,152.76 and 7,647.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.32 : 17,152.76 = 7,647.48 : x
2. Step 2: Convert to fraction form
   12,429.32/17,152.76 = 7,647.48/x
3. Step 3: Cross multiply
   12,429.32x = 17,152.76 × 7,647.48
4. Step 4: Simplify right side
   12,429.32x = 131,175,408.16
5. Step 5: Solve for x
   x = 131,175,408.16/12,429.32
6. Step 6: Final answer
   x = 10,553.71