Finding the Fourth Proportional to 9,667.40, 14,457.90 and 8,112.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,667.40 : 14,457.90 = 8,112.20 : x
2. Step 2: Convert to fraction form
   9,667.40/14,457.90 = 8,112.20/x
3. Step 3: Cross multiply
   9,667.40x = 14,457.90 × 8,112.20
4. Step 4: Simplify right side
   9,667.40x = 117,285,376.38
5. Step 5: Solve for x
   x = 117,285,376.38/9,667.40
6. Step 6: Final answer
   x = 12,132.05