Finding the Third Proportional to 1,212,725 and 2,640,599

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212,725 : 2,640,599 = 2,640,599 : x
2. Step 2: Convert to fraction form
   1,212,725/2,640,599 = 2,640,599/x
3. Step 3: Cross multiply
   1,212,725x = 2,640,599 × 2,640,599
4. Step 4: Simplify right side
   1,212,725x = 6,972,763,078,801
5. Step 5: Solve for x
   x = 6,972,763,078,801/1,212,725
6. Step 6: Final answer
   x = 5,749,665.49