Finding the Fourth Proportional to 33,181.50, 49,794.12 and 12,405

Step by Step Solution

1. Step 1: Write the proportion equation
   33,181.50 : 49,794.12 = 12,405 : x
2. Step 2: Convert to fraction form
   33,181.50/49,794.12 = 12,405/x
3. Step 3: Cross multiply
   33,181.50x = 49,794.12 × 12,405
4. Step 4: Simplify right side
   33,181.50x = 617,696,058.60
5. Step 5: Solve for x
   x = 617,696,058.60/33,181.50
6. Step 6: Final answer
   x = 18,615.68