Finding the Third Proportional to 648,292 and 981,390

Step by Step Solution

1. Step 1: Write the proportion equation
   648,292 : 981,390 = 981,390 : x
2. Step 2: Convert to fraction form
   648,292/981,390 = 981,390/x
3. Step 3: Cross multiply
   648,292x = 981,390 × 981,390
4. Step 4: Simplify right side
   648,292x = 963,126,332,100
5. Step 5: Solve for x
   x = 963,126,332,100/648,292
6. Step 6: Final answer
   x = 1,485,636.61