Finding the Fourth Proportional to 139,285.25, 209,010.90 and 50,545.68

Step by Step Solution

1. Step 1: Write the proportion equation
   139,285.25 : 209,010.90 = 50,545.68 : x
2. Step 2: Convert to fraction form
   139,285.25/209,010.90 = 50,545.68/x
3. Step 3: Cross multiply
   139,285.25x = 209,010.90 × 50,545.68
4. Step 4: Simplify right side
   139,285.25x = 10,564,598,067.91
5. Step 5: Solve for x
   x = 10,564,598,067.91/139,285.25
6. Step 6: Final answer
   x = 75,848.65