Finding the Fourth Proportional to 12,949.92, 19,461.89 and 12,072.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,949.92 : 19,461.89 = 12,072.39 : x
2. Step 2: Convert to fraction form
   12,949.92/19,461.89 = 12,072.39/x
3. Step 3: Cross multiply
   12,949.92x = 19,461.89 × 12,072.39
4. Step 4: Simplify right side
   12,949.92x = 234,951,459.09
5. Step 5: Solve for x
   x = 234,951,459.09/12,949.92
6. Step 6: Final answer
   x = 18,143.09