Finding the Fourth Proportional to 139,697.92, 192,749.44 and 82,339.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,697.92 : 192,749.44 = 82,339.60 : x
2. Step 2: Convert to fraction form
   139,697.92/192,749.44 = 82,339.60/x
3. Step 3: Cross multiply
   139,697.92x = 192,749.44 × 82,339.60
4. Step 4: Simplify right side
   139,697.92x = 15,870,911,789.82
5. Step 5: Solve for x
   x = 15,870,911,789.82/139,697.92
6. Step 6: Final answer
   x = 113,608.79