Finding the Third Proportional to 648,170 and 981,210

Step by Step Solution

1. Step 1: Write the proportion equation
   648,170 : 981,210 = 981,210 : x
2. Step 2: Convert to fraction form
   648,170/981,210 = 981,210/x
3. Step 3: Cross multiply
   648,170x = 981,210 × 981,210
4. Step 4: Simplify right side
   648,170x = 962,773,064,100
5. Step 5: Solve for x
   x = 962,773,064,100/648,170
6. Step 6: Final answer
   x = 1,485,371.22