Finding the Fourth Proportional to 139,545.72, 209,318.73 and 50,799.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,545.72 : 209,318.73 = 50,799.96 : x
2. Step 2: Convert to fraction form
   139,545.72/209,318.73 = 50,799.96/x
3. Step 3: Cross multiply
   139,545.72x = 209,318.73 × 50,799.96
4. Step 4: Simplify right side
   139,545.72x = 10,633,383,111.25
5. Step 5: Solve for x
   x = 10,633,383,111.25/139,545.72
6. Step 6: Final answer
   x = 76,199.99