Finding the Third Proportional to 648,918 and 1,387,512

Step by Step Solution

1. Step 1: Write the proportion equation
   648,918 : 1,387,512 = 1,387,512 : x
2. Step 2: Convert to fraction form
   648,918/1,387,512 = 1,387,512/x
3. Step 3: Cross multiply
   648,918x = 1,387,512 × 1,387,512
4. Step 4: Simplify right side
   648,918x = 1,925,189,550,144
5. Step 5: Solve for x
   x = 1,925,189,550,144/648,918
6. Step 6: Final answer
   x = 2,966,768.61