Finding the Fourth Proportional to 139,305.36, 208,957.52 and 50,558.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,305.36 : 208,957.52 = 50,558.72 : x
2. Step 2: Convert to fraction form
   139,305.36/208,957.52 = 50,558.72/x
3. Step 3: Cross multiply
   139,305.36x = 208,957.52 × 50,558.72
4. Step 4: Simplify right side
   139,305.36x = 10,564,624,745.57
5. Step 5: Solve for x
   x = 10,564,624,745.57/139,305.36
6. Step 6: Final answer
   x = 75,837.89