Finding the Fourth Proportional to 12,162.48, 16,784.82 and 6,857.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,162.48 : 16,784.82 = 6,857.31 : x
2. Step 2: Convert to fraction form
   12,162.48/16,784.82 = 6,857.31/x
3. Step 3: Cross multiply
   12,162.48x = 16,784.82 × 6,857.31
4. Step 4: Simplify right side
   12,162.48x = 115,098,714.03
5. Step 5: Solve for x
   x = 115,098,714.03/12,162.48
6. Step 6: Final answer
   x = 9,463.42