Finding the Fourth Proportional to 139,375.11, 192,339.72 and 78,944.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,375.11 : 192,339.72 = 78,944.25 : x
2. Step 2: Convert to fraction form
   139,375.11/192,339.72 = 78,944.25/x
3. Step 3: Cross multiply
   139,375.11x = 192,339.72 × 78,944.25
4. Step 4: Simplify right side
   139,375.11x = 15,184,114,940.61
5. Step 5: Solve for x
   x = 15,184,114,940.61/139,375.11
6. Step 6: Final answer
   x = 108,944.24