Finding the Fourth Proportional to 12,913.42, 17,826.78 and 8,662.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.42 : 17,826.78 = 8,662.96 : x
2. Step 2: Convert to fraction form
   12,913.42/17,826.78 = 8,662.96/x
3. Step 3: Cross multiply
   12,913.42x = 17,826.78 × 8,662.96
4. Step 4: Simplify right side
   12,913.42x = 154,432,682.07
5. Step 5: Solve for x
   x = 154,432,682.07/12,913.42
6. Step 6: Final answer
   x = 11,959.08