Finding the Fourth Proportional to 139,546.59, 192,568.42 and 79,121.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,546.59 : 192,568.42 = 79,121.28 : x
2. Step 2: Convert to fraction form
   139,546.59/192,568.42 = 79,121.28/x
3. Step 3: Cross multiply
   139,546.59x = 192,568.42 × 79,121.28
4. Step 4: Simplify right side
   139,546.59x = 15,236,259,877.98
5. Step 5: Solve for x
   x = 15,236,259,877.98/139,546.59
6. Step 6: Final answer
   x = 109,184.04