Finding the Fourth Proportional to 158,338.69, 218,499.27 and 86,717.18

Step by Step Solution

1. Step 1: Write the proportion equation
   158,338.69 : 218,499.27 = 86,717.18 : x
2. Step 2: Convert to fraction form
   158,338.69/218,499.27 = 86,717.18/x
3. Step 3: Cross multiply
   158,338.69x = 218,499.27 × 86,717.18
4. Step 4: Simplify right side
   158,338.69x = 18,947,640,526.46
5. Step 5: Solve for x
   x = 18,947,640,526.46/158,338.69
6. Step 6: Final answer
   x = 119,665.26