Finding the Fourth Proportional to 139,446.81, 192,429.20 and 79,018.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,446.81 : 192,429.20 = 79,018.18 : x
2. Step 2: Convert to fraction form
   139,446.81/192,429.20 = 79,018.18/x
3. Step 3: Cross multiply
   139,446.81x = 192,429.20 × 79,018.18
4. Step 4: Simplify right side
   139,446.81x = 15,205,404,879.33
5. Step 5: Solve for x
   x = 15,205,404,879.33/139,446.81
6. Step 6: Final answer
   x = 109,040.89