Finding the Fourth Proportional to 10,786.96, 16,165.40 and 8,152.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,786.96 : 16,165.40 = 8,152.30 : x
2. Step 2: Convert to fraction form
   10,786.96/16,165.40 = 8,152.30/x
3. Step 3: Cross multiply
   10,786.96x = 16,165.40 × 8,152.30
4. Step 4: Simplify right side
   10,786.96x = 131,785,190.42
5. Step 5: Solve for x
   x = 131,785,190.42/10,786.96
6. Step 6: Final answer
   x = 12,217.08