Finding the Third Proportional to 150,012 and 320,760

Step by Step Solution

1. Step 1: Write the proportion equation
   150,012 : 320,760 = 320,760 : x
2. Step 2: Convert to fraction form
   150,012/320,760 = 320,760/x
3. Step 3: Cross multiply
   150,012x = 320,760 × 320,760
4. Step 4: Simplify right side
   150,012x = 102,886,977,600
5. Step 5: Solve for x
   x = 102,886,977,600/150,012
6. Step 6: Final answer
   x = 685,858.32