Finding the Fourth Proportional to 158,189.61, 218,300.82 and 86,569.47

Step by Step Solution

1. Step 1: Write the proportion equation
   158,189.61 : 218,300.82 = 86,569.47 : x
2. Step 2: Convert to fraction form
   158,189.61/218,300.82 = 86,569.47/x
3. Step 3: Cross multiply
   158,189.61x = 218,300.82 × 86,569.47
4. Step 4: Simplify right side
   158,189.61x = 18,898,186,287.97
5. Step 5: Solve for x
   x = 18,898,186,287.97/158,189.61
6. Step 6: Final answer
   x = 119,465.41