Finding the Fourth Proportional to 12,915.15, 17,818.32 and 8,441.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.15 : 17,818.32 = 8,441.48 : x
2. Step 2: Convert to fraction form
   12,915.15/17,818.32 = 8,441.48/x
3. Step 3: Cross multiply
   12,915.15x = 17,818.32 × 8,441.48
4. Step 4: Simplify right side
   12,915.15x = 150,412,920.40
5. Step 5: Solve for x
   x = 150,412,920.40/12,915.15
6. Step 6: Final answer
   x = 11,646.24