Finding the Fourth Proportional to 33,139.62, 49,707.81 and 12,361.50

Step by Step Solution

1. Step 1: Write the proportion equation
   33,139.62 : 49,707.81 = 12,361.50 : x
2. Step 2: Convert to fraction form
   33,139.62/49,707.81 = 12,361.50/x
3. Step 3: Cross multiply
   33,139.62x = 49,707.81 × 12,361.50
4. Step 4: Simplify right side
   33,139.62x = 614,463,093.32
5. Step 5: Solve for x
   x = 614,463,093.32/33,139.62
6. Step 6: Final answer
   x = 18,541.65