Finding the Fourth Proportional to 139,703.94, 192,804.90 and 86,020.38

Step by Step Solution

1. Step 1: Write the proportion equation
   139,703.94 : 192,804.90 = 86,020.38 : x
2. Step 2: Convert to fraction form
   139,703.94/192,804.90 = 86,020.38/x
3. Step 3: Cross multiply
   139,703.94x = 192,804.90 × 86,020.38
4. Step 4: Simplify right side
   139,703.94x = 16,585,150,763.86
5. Step 5: Solve for x
   x = 16,585,150,763.86/139,703.94
6. Step 6: Final answer
   x = 118,716.41