Finding the Fourth Proportional to 158,109.50, 218,188.26 and 86,488.89

Step by Step Solution

1. Step 1: Write the proportion equation
   158,109.50 : 218,188.26 = 86,488.89 : x
2. Step 2: Convert to fraction form
   158,109.50/218,188.26 = 86,488.89/x
3. Step 3: Cross multiply
   158,109.50x = 218,188.26 × 86,488.89
4. Step 4: Simplify right side
   158,109.50x = 18,870,860,418.43
5. Step 5: Solve for x
   x = 18,870,860,418.43/158,109.50
6. Step 6: Final answer
   x = 119,353.11