Finding the Fourth Proportional to 139,728, 192,839.22 and 79,314.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,728 : 192,839.22 = 79,314.96 : x
2. Step 2: Convert to fraction form
   139,728/192,839.22 = 79,314.96/x
3. Step 3: Cross multiply
   139,728x = 192,839.22 × 79,314.96
4. Step 4: Simplify right side
   139,728x = 15,295,035,020.73
5. Step 5: Solve for x
   x = 15,295,035,020.73/139,728
6. Step 6: Final answer
   x = 109,462.92