Finding the Fourth Proportional to 139,285, 209,010.52 and 50,545.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,285 : 209,010.52 = 50,545.43 : x
2. Step 2: Convert to fraction form
   139,285/209,010.52 = 50,545.43/x
3. Step 3: Cross multiply
   139,285x = 209,010.52 × 50,545.43
4. Step 4: Simplify right side
   139,285x = 10,564,526,607.92
5. Step 5: Solve for x
   x = 10,564,526,607.92/139,285
6. Step 6: Final answer
   x = 75,848.27