Finding the Fourth Proportional to 139,398.15, 209,105.24 and 39,550.53

Step by Step Solution

1. Step 1: Write the proportion equation
   139,398.15 : 209,105.24 = 39,550.53 : x
2. Step 2: Convert to fraction form
   139,398.15/209,105.24 = 39,550.53/x
3. Step 3: Cross multiply
   139,398.15x = 209,105.24 × 39,550.53
4. Step 4: Simplify right side
   139,398.15x = 8,270,222,870.02
5. Step 5: Solve for x
   x = 8,270,222,870.02/139,398.15
6. Step 6: Final answer
   x = 59,328.07