Finding the Fourth Proportional to 12,915.43, 17,818.71 and 8,441.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.43 : 17,818.71 = 8,441.76 : x
2. Step 2: Convert to fraction form
   12,915.43/17,818.71 = 8,441.76/x
3. Step 3: Cross multiply
   12,915.43x = 17,818.71 × 8,441.76
4. Step 4: Simplify right side
   12,915.43x = 150,421,275.08
5. Step 5: Solve for x
   x = 150,421,275.08/12,915.43
6. Step 6: Final answer
   x = 11,646.64