Finding the Fourth Proportional to 139,292.24, 192,212.79 and 78,849.03

Step by Step Solution

1. Step 1: Write the proportion equation
   139,292.24 : 192,212.79 = 78,849.03 : x
2. Step 2: Convert to fraction form
   139,292.24/192,212.79 = 78,849.03/x
3. Step 3: Cross multiply
   139,292.24x = 192,212.79 × 78,849.03
4. Step 4: Simplify right side
   139,292.24x = 15,155,792,045.09
5. Step 5: Solve for x
   x = 15,155,792,045.09/139,292.24
6. Step 6: Final answer
   x = 108,805.72