Finding the Fourth Proportional to 139,054.73, 208,489.95 and 50,296.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,054.73 : 208,489.95 = 50,296.55 : x
2. Step 2: Convert to fraction form
   139,054.73/208,489.95 = 50,296.55/x
3. Step 3: Cross multiply
   139,054.73x = 208,489.95 × 50,296.55
4. Step 4: Simplify right side
   139,054.73x = 10,486,324,152.22
5. Step 5: Solve for x
   x = 10,486,324,152.22/139,054.73
6. Step 6: Final answer
   x = 75,411.49