Finding the Third Proportional to 1,277,260 and 2,128,678

Step by Step Solution

1. Step 1: Write the proportion equation
   1,277,260 : 2,128,678 = 2,128,678 : x
2. Step 2: Convert to fraction form
   1,277,260/2,128,678 = 2,128,678/x
3. Step 3: Cross multiply
   1,277,260x = 2,128,678 × 2,128,678
4. Step 4: Simplify right side
   1,277,260x = 4,531,270,027,684
5. Step 5: Solve for x
   x = 4,531,270,027,684/1,277,260
6. Step 6: Final answer
   x = 3,547,648.90