Finding the Fourth Proportional to 158,233.74, 218,362.89 and 86,618.34

Step by Step Solution

1. Step 1: Write the proportion equation
   158,233.74 : 218,362.89 = 86,618.34 : x
2. Step 2: Convert to fraction form
   158,233.74/218,362.89 = 86,618.34/x
3. Step 3: Cross multiply
   158,233.74x = 218,362.89 × 86,618.34
4. Step 4: Simplify right side
   158,233.74x = 18,914,231,049.40
5. Step 5: Solve for x
   x = 18,914,231,049.40/158,233.74
6. Step 6: Final answer
   x = 119,533.49