Finding the Fourth Proportional to 199,086.24, 298,458.24 and 86,680.80

Step by Step Solution

1. Step 1: Write the proportion equation
   199,086.24 : 298,458.24 = 86,680.80 : x
2. Step 2: Convert to fraction form
   199,086.24/298,458.24 = 86,680.80/x
3. Step 3: Cross multiply
   199,086.24x = 298,458.24 × 86,680.80
4. Step 4: Simplify right side
   199,086.24x = 25,870,599,009.79
5. Step 5: Solve for x
   x = 25,870,599,009.79/199,086.24
6. Step 6: Final answer
   x = 129,946.70