Finding the Fourth Proportional to 33,648.06, 50,471 and 13,920.78

Step by Step Solution

1. Step 1: Write the proportion equation
   33,648.06 : 50,471 = 13,920.78 : x
2. Step 2: Convert to fraction form
   33,648.06/50,471 = 13,920.78/x
3. Step 3: Cross multiply
   33,648.06x = 50,471 × 13,920.78
4. Step 4: Simplify right side
   33,648.06x = 702,595,687.38
5. Step 5: Solve for x
   x = 702,595,687.38/33,648.06
6. Step 6: Final answer
   x = 20,880.72