Finding the Fourth Proportional to 158,389.83, 218,568.78 and 86,757.38

Step by Step Solution

1. Step 1: Write the proportion equation
   158,389.83 : 218,568.78 = 86,757.38 : x
2. Step 2: Convert to fraction form
   158,389.83/218,568.78 = 86,757.38/x
3. Step 3: Cross multiply
   158,389.83x = 218,568.78 × 86,757.38
4. Step 4: Simplify right side
   158,389.83x = 18,962,454,429.39
5. Step 5: Solve for x
   x = 18,962,454,429.39/158,389.83
6. Step 6: Final answer
   x = 119,720.15