Finding the Third Proportional to 86,221.50 and 188,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,221.50 : 188,479.50 = 188,479.50 : x
2. Step 2: Convert to fraction form
   86,221.50/188,479.50 = 188,479.50/x
3. Step 3: Cross multiply
   86,221.50x = 188,479.50 × 188,479.50
4. Step 4: Simplify right side
   86,221.50x = 35,524,521,920.25
5. Step 5: Solve for x
   x = 35,524,521,920.25/86,221.50
6. Step 6: Final answer
   x = 412,014.66