Finding the Fourth Proportional to 158,540.37, 218,779.89 and 86,918.82

Step by Step Solution

1. Step 1: Write the proportion equation
   158,540.37 : 218,779.89 = 86,918.82 : x
2. Step 2: Convert to fraction form
   158,540.37/218,779.89 = 86,918.82/x
3. Step 3: Cross multiply
   158,540.37x = 218,779.89 × 86,918.82
4. Step 4: Simplify right side
   158,540.37x = 19,016,089,878.53
5. Step 5: Solve for x
   x = 19,016,089,878.53/158,540.37
6. Step 6: Final answer
   x = 119,944.78