Finding the Fourth Proportional to 139,049.81, 208,451.03 and 50,283.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,049.81 : 208,451.03 = 50,283.60 : x
2. Step 2: Convert to fraction form
   139,049.81/208,451.03 = 50,283.60/x
3. Step 3: Cross multiply
   139,049.81x = 208,451.03 × 50,283.60
4. Step 4: Simplify right side
   139,049.81x = 10,481,667,960.69
5. Step 5: Solve for x
   x = 10,481,667,960.69/139,049.81
6. Step 6: Final answer
   x = 75,380.67