Finding the Fourth Proportional to 158,388.09, 218,573.33 and 86,768.60

Step by Step Solution

1. Step 1: Write the proportion equation
   158,388.09 : 218,573.33 = 86,768.60 : x
2. Step 2: Convert to fraction form
   158,388.09/218,573.33 = 86,768.60/x
3. Step 3: Cross multiply
   158,388.09x = 218,573.33 × 86,768.60
4. Step 4: Simplify right side
   158,388.09x = 18,965,300,314.73
5. Step 5: Solve for x
   x = 18,965,300,314.73/158,388.09
6. Step 6: Final answer
   x = 119,739.43