Finding the Third Proportional to 308,072 and 661,984

Step by Step Solution

1. Step 1: Write the proportion equation
   308,072 : 661,984 = 661,984 : x
2. Step 2: Convert to fraction form
   308,072/661,984 = 661,984/x
3. Step 3: Cross multiply
   308,072x = 661,984 × 661,984
4. Step 4: Simplify right side
   308,072x = 438,222,816,256
5. Step 5: Solve for x
   x = 438,222,816,256/308,072
6. Step 6: Final answer
   x = 1,422,468.83