Finding the Fourth Proportional to 102,667.36, 153,786.24 and 82,568.21

Step by Step Solution

1. Step 1: Write the proportion equation
   102,667.36 : 153,786.24 = 82,568.21 : x
2. Step 2: Convert to fraction form
   102,667.36/153,786.24 = 82,568.21/x
3. Step 3: Cross multiply
   102,667.36x = 153,786.24 × 82,568.21
4. Step 4: Simplify right side
   102,667.36x = 12,697,854,559.43
5. Step 5: Solve for x
   x = 12,697,854,559.43/102,667.36
6. Step 6: Final answer
   x = 123,679.57