Finding the Fourth Proportional to 139,591.05, 209,390.67 and 50,910.93

Step by Step Solution

1. Step 1: Write the proportion equation
   139,591.05 : 209,390.67 = 50,910.93 : x
2. Step 2: Convert to fraction form
   139,591.05/209,390.67 = 50,910.93/x
3. Step 3: Cross multiply
   139,591.05x = 209,390.67 × 50,910.93
4. Step 4: Simplify right side
   139,591.05x = 10,660,273,743.02
5. Step 5: Solve for x
   x = 10,660,273,743.02/139,591.05
6. Step 6: Final answer
   x = 76,367.89