Finding the Fourth Proportional to 33,628.56, 50,397.48 and 12,840.72

Step by Step Solution

1. Step 1: Write the proportion equation
   33,628.56 : 50,397.48 = 12,840.72 : x
2. Step 2: Convert to fraction form
   33,628.56/50,397.48 = 12,840.72/x
3. Step 3: Cross multiply
   33,628.56x = 50,397.48 × 12,840.72
4. Step 4: Simplify right side
   33,628.56x = 647,139,929.39
5. Step 5: Solve for x
   x = 647,139,929.39/33,628.56
6. Step 6: Final answer
   x = 19,243.76