Finding the Third Proportional to 648,288 and 981,384

Step by Step Solution

1. Step 1: Write the proportion equation
   648,288 : 981,384 = 981,384 : x
2. Step 2: Convert to fraction form
   648,288/981,384 = 981,384/x
3. Step 3: Cross multiply
   648,288x = 981,384 × 981,384
4. Step 4: Simplify right side
   648,288x = 963,114,555,456
5. Step 5: Solve for x
   x = 963,114,555,456/648,288
6. Step 6: Final answer
   x = 1,485,627.62