Finding the Third Proportional to 648,240 and 981,300

Step by Step Solution

1. Step 1: Write the proportion equation
   648,240 : 981,300 = 981,300 : x
2. Step 2: Convert to fraction form
   648,240/981,300 = 981,300/x
3. Step 3: Cross multiply
   648,240x = 981,300 × 981,300
4. Step 4: Simplify right side
   648,240x = 962,949,690,000
5. Step 5: Solve for x
   x = 962,949,690,000/648,240
6. Step 6: Final answer
   x = 1,485,483.29