Finding the Fourth Proportional to 139,443.80, 192,425.08 and 79,015.17

Step by Step Solution

1. Step 1: Write the proportion equation
   139,443.80 : 192,425.08 = 79,015.17 : x
2. Step 2: Convert to fraction form
   139,443.80/192,425.08 = 79,015.17/x
3. Step 3: Cross multiply
   139,443.80x = 192,425.08 × 79,015.17
4. Step 4: Simplify right side
   139,443.80x = 15,204,499,489.33
5. Step 5: Solve for x
   x = 15,204,499,489.33/139,443.80
6. Step 6: Final answer
   x = 109,036.76