Finding the Third Proportional to 648,216 and 981,270

Step by Step Solution

1. Step 1: Write the proportion equation
   648,216 : 981,270 = 981,270 : x
2. Step 2: Convert to fraction form
   648,216/981,270 = 981,270/x
3. Step 3: Cross multiply
   648,216x = 981,270 × 981,270
4. Step 4: Simplify right side
   648,216x = 962,890,812,900
5. Step 5: Solve for x
   x = 962,890,812,900/648,216
6. Step 6: Final answer
   x = 1,485,447.46