Finding the Fourth Proportional to 12,162.16, 16,783.68 and 6,856.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,162.16 : 16,783.68 = 6,856.72 : x
2. Step 2: Convert to fraction form
   12,162.16/16,783.68 = 6,856.72/x
3. Step 3: Cross multiply
   12,162.16x = 16,783.68 × 6,856.72
4. Step 4: Simplify right side
   12,162.16x = 115,080,994.33
5. Step 5: Solve for x
   x = 115,080,994.33/12,162.16
6. Step 6: Final answer
   x = 9,462.22