Finding the Fourth Proportional to 139,290, 209,018.02 and 50,550.44

Step by Step Solution

1. Step 1: Write the proportion equation
   139,290 : 209,018.02 = 50,550.44 : x
2. Step 2: Convert to fraction form
   139,290/209,018.02 = 50,550.44/x
3. Step 3: Cross multiply
   139,290x = 209,018.02 × 50,550.44
4. Step 4: Simplify right side
   139,290x = 10,565,952,878.93
5. Step 5: Solve for x
   x = 10,565,952,878.93/139,290
6. Step 6: Final answer
   x = 75,855.79