Finding the Fourth Proportional to 139,647.78, 192,733.74 and 79,233.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,647.78 : 192,733.74 = 79,233.42 : x
2. Step 2: Convert to fraction form
   139,647.78/192,733.74 = 79,233.42/x
3. Step 3: Cross multiply
   139,647.78x = 192,733.74 × 79,233.42
4. Step 4: Simplify right side
   139,647.78x = 15,270,953,369.59
5. Step 5: Solve for x
   x = 15,270,953,369.59/139,647.78
6. Step 6: Final answer
   x = 109,353.36