Finding the Fourth Proportional to 139,293.41, 192,236.81 and 78,874.70

Step by Step Solution

1. Step 1: Write the proportion equation
   139,293.41 : 192,236.81 = 78,874.70 : x
2. Step 2: Convert to fraction form
   139,293.41/192,236.81 = 78,874.70/x
3. Step 3: Cross multiply
   139,293.41x = 192,236.81 × 78,874.70
4. Step 4: Simplify right side
   139,293.41x = 15,162,619,362.15
5. Step 5: Solve for x
   x = 15,162,619,362.15/139,293.41
6. Step 6: Final answer
   x = 108,853.82