Finding the Third Proportional to 648,171 and 981,212

Step by Step Solution

1. Step 1: Write the proportion equation
   648,171 : 981,212 = 981,212 : x
2. Step 2: Convert to fraction form
   648,171/981,212 = 981,212/x
3. Step 3: Cross multiply
   648,171x = 981,212 × 981,212
4. Step 4: Simplify right side
   648,171x = 962,776,988,944
5. Step 5: Solve for x
   x = 962,776,988,944/648,171
6. Step 6: Final answer
   x = 1,485,374.98