Finding the Fourth Proportional to 115,017.36, 158,786.25 and 80,667.58

Step by Step Solution

1. Step 1: Write the proportion equation
   115,017.36 : 158,786.25 = 80,667.58 : x
2. Step 2: Convert to fraction form
   115,017.36/158,786.25 = 80,667.58/x
3. Step 3: Cross multiply
   115,017.36x = 158,786.25 × 80,667.58
4. Step 4: Simplify right side
   115,017.36x = 12,808,902,524.78
5. Step 5: Solve for x
   x = 12,808,902,524.78/115,017.36
6. Step 6: Final answer
   x = 111,364.95