Finding the Third Proportional to 648,231 and 981,290

Step by Step Solution

1. Step 1: Write the proportion equation
   648,231 : 981,290 = 981,290 : x
2. Step 2: Convert to fraction form
   648,231/981,290 = 981,290/x
3. Step 3: Cross multiply
   648,231x = 981,290 × 981,290
4. Step 4: Simplify right side
   648,231x = 962,930,064,100
5. Step 5: Solve for x
   x = 962,930,064,100/648,231
6. Step 6: Final answer
   x = 1,485,473.64