Finding the Third Proportional to 1,277,239 and 2,128,647

Step by Step Solution

1. Step 1: Write the proportion equation
   1,277,239 : 2,128,647 = 2,128,647 : x
2. Step 2: Convert to fraction form
   1,277,239/2,128,647 = 2,128,647/x
3. Step 3: Cross multiply
   1,277,239x = 2,128,647 × 2,128,647
4. Step 4: Simplify right side
   1,277,239x = 4,531,138,050,609
5. Step 5: Solve for x
   x = 4,531,138,050,609/1,277,239
6. Step 6: Final answer
   x = 3,547,603.89