Finding the Fourth Proportional to 139,309.36, 208,963.52 and 50,562.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,309.36 : 208,963.52 = 50,562.72 : x
2. Step 2: Convert to fraction form
   139,309.36/208,963.52 = 50,562.72/x
3. Step 3: Cross multiply
   139,309.36x = 208,963.52 × 50,562.72
4. Step 4: Simplify right side
   139,309.36x = 10,565,763,951.97
5. Step 5: Solve for x
   x = 10,565,763,951.97/139,309.36
6. Step 6: Final answer
   x = 75,843.89