Finding the Fourth Proportional to 139,377.81, 192,327.51 and 78,936.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,377.81 : 192,327.51 = 78,936.42 : x
2. Step 2: Convert to fraction form
   139,377.81/192,327.51 = 78,936.42/x
3. Step 3: Cross multiply
   139,377.81x = 192,327.51 × 78,936.42
4. Step 4: Simplify right side
   139,377.81x = 15,181,646,124.15
5. Step 5: Solve for x
   x = 15,181,646,124.15/139,377.81
6. Step 6: Final answer
   x = 108,924.41