Finding the Fourth Proportional to 33,719.91, 50,585.34 and 12,661.61

Step by Step Solution

1. Step 1: Write the proportion equation
   33,719.91 : 50,585.34 = 12,661.61 : x
2. Step 2: Convert to fraction form
   33,719.91/50,585.34 = 12,661.61/x
3. Step 3: Cross multiply
   33,719.91x = 50,585.34 × 12,661.61
4. Step 4: Simplify right side
   33,719.91x = 640,491,846.80
5. Step 5: Solve for x
   x = 640,491,846.80/33,719.91
6. Step 6: Final answer
   x = 18,994.47