Finding the Fourth Proportional to 33,123.36, 49,686.60 and 10,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   33,123.36 : 49,686.60 = 10,938.72 : x
2. Step 2: Convert to fraction form
   33,123.36/49,686.60 = 10,938.72/x
3. Step 3: Cross multiply
   33,123.36x = 49,686.60 × 10,938.72
4. Step 4: Simplify right side
   33,123.36x = 543,507,805.15
5. Step 5: Solve for x
   x = 543,507,805.15/33,123.36
6. Step 6: Final answer
   x = 16,408.60