Finding the Fourth Proportional to 10,826.18, 16,213.72 and 8,469.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,826.18 : 16,213.72 = 8,469.69 : x
2. Step 2: Convert to fraction form
   10,826.18/16,213.72 = 8,469.69/x
3. Step 3: Cross multiply
   10,826.18x = 16,213.72 × 8,469.69
4. Step 4: Simplify right side
   10,826.18x = 137,325,182.15
5. Step 5: Solve for x
   x = 137,325,182.15/10,826.18
6. Step 6: Final answer
   x = 12,684.55