Finding the Fourth Proportional to 12,456.42, 17,189.79 and 6,867.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.42 : 17,189.79 = 6,867.42 : x
2. Step 2: Convert to fraction form
   12,456.42/17,189.79 = 6,867.42/x
3. Step 3: Cross multiply
   12,456.42x = 17,189.79 × 6,867.42
4. Step 4: Simplify right side
   12,456.42x = 118,049,507.64
5. Step 5: Solve for x
   x = 118,049,507.64/12,456.42
6. Step 6: Final answer
   x = 9,477.00