Finding the Third Proportional to 648,258 and 981,330

Step by Step Solution

1. Step 1: Write the proportion equation
   648,258 : 981,330 = 981,330 : x
2. Step 2: Convert to fraction form
   648,258/981,330 = 981,330/x
3. Step 3: Cross multiply
   648,258x = 981,330 × 981,330
4. Step 4: Simplify right side
   648,258x = 963,008,568,900
5. Step 5: Solve for x
   x = 963,008,568,900/648,258
6. Step 6: Final answer
   x = 1,485,532.87