Finding the Fourth Proportional to 158,469.69, 218,689.89 and 86,848.17

Step by Step Solution

1. Step 1: Write the proportion equation
   158,469.69 : 218,689.89 = 86,848.17 : x
2. Step 2: Convert to fraction form
   158,469.69/218,689.89 = 86,848.17/x
3. Step 3: Cross multiply
   158,469.69x = 218,689.89 × 86,848.17
4. Step 4: Simplify right side
   158,469.69x = 18,992,816,744.00
5. Step 5: Solve for x
   x = 18,992,816,744.00/158,469.69
6. Step 6: Final answer
   x = 119,851.42