Finding the Third Proportional to 72,219 and 150,999

Step by Step Solution

1. Step 1: Write the proportion equation
   72,219 : 150,999 = 150,999 : x
2. Step 2: Convert to fraction form
   72,219/150,999 = 150,999/x
3. Step 3: Cross multiply
   72,219x = 150,999 × 150,999
4. Step 4: Simplify right side
   72,219x = 22,800,698,001
5. Step 5: Solve for x
   x = 22,800,698,001/72,219
6. Step 6: Final answer
   x = 315,716.06