Finding the Fourth Proportional to 139,292.15, 209,021.22 and 50,552.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,292.15 : 209,021.22 = 50,552.57 : x
2. Step 2: Convert to fraction form
   139,292.15/209,021.22 = 50,552.57/x
3. Step 3: Cross multiply
   139,292.15x = 209,021.22 × 50,552.57
4. Step 4: Simplify right side
   139,292.15x = 10,566,559,855.54
5. Step 5: Solve for x
   x = 10,566,559,855.54/139,292.15
6. Step 6: Final answer
   x = 75,858.98