Finding the Third Proportional to 648,288 and 981,360

Step by Step Solution

1. Step 1: Write the proportion equation
   648,288 : 981,360 = 981,360 : x
2. Step 2: Convert to fraction form
   648,288/981,360 = 981,360/x
3. Step 3: Cross multiply
   648,288x = 981,360 × 981,360
4. Step 4: Simplify right side
   648,288x = 963,067,449,600
5. Step 5: Solve for x
   x = 963,067,449,600/648,288
6. Step 6: Final answer
   x = 1,485,554.95