Finding the Fourth Proportional to 139,013.82, 208,545.44 and 50,391.11

Step by Step Solution

1. Step 1: Write the proportion equation
   139,013.82 : 208,545.44 = 50,391.11 : x
2. Step 2: Convert to fraction form
   139,013.82/208,545.44 = 50,391.11/x
3. Step 3: Cross multiply
   139,013.82x = 208,545.44 × 50,391.11
4. Step 4: Simplify right side
   139,013.82x = 10,508,836,476.45
5. Step 5: Solve for x
   x = 10,508,836,476.45/139,013.82
6. Step 6: Final answer
   x = 75,595.62