Finding the Fourth Proportional to 33,786.79, 50,672.32 and 12,728.94

Step by Step Solution

1. Step 1: Write the proportion equation
   33,786.79 : 50,672.32 = 12,728.94 : x
2. Step 2: Convert to fraction form
   33,786.79/50,672.32 = 12,728.94/x
3. Step 3: Cross multiply
   33,786.79x = 50,672.32 × 12,728.94
4. Step 4: Simplify right side
   33,786.79x = 645,004,699.10
5. Step 5: Solve for x
   x = 645,004,699.10/33,786.79
6. Step 6: Final answer
   x = 19,090.44