Finding the Fourth Proportional to 139,443.26, 192,431.18 and 79,025.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,443.26 : 192,431.18 = 79,025.42 : x
2. Step 2: Convert to fraction form
   139,443.26/192,431.18 = 79,025.42/x
3. Step 3: Cross multiply
   139,443.26x = 192,431.18 × 79,025.42
4. Step 4: Simplify right side
   139,443.26x = 15,206,954,820.60
5. Step 5: Solve for x
   x = 15,206,954,820.60/139,443.26
6. Step 6: Final answer
   x = 109,054.79