Finding the Fourth Proportional to 139,085.15, 208,627.87 and 50,317.85

Step by Step Solution

1. Step 1: Write the proportion equation
   139,085.15 : 208,627.87 = 50,317.85 : x
2. Step 2: Convert to fraction form
   139,085.15/208,627.87 = 50,317.85/x
3. Step 3: Cross multiply
   139,085.15x = 208,627.87 × 50,317.85
4. Step 4: Simplify right side
   139,085.15x = 10,497,705,616.89
5. Step 5: Solve for x
   x = 10,497,705,616.89/139,085.15
6. Step 6: Final answer
   x = 75,476.83