Finding the Third Proportional to 1,277,240 and 2,128,648

Step by Step Solution

1. Step 1: Write the proportion equation
   1,277,240 : 2,128,648 = 2,128,648 : x
2. Step 2: Convert to fraction form
   1,277,240/2,128,648 = 2,128,648/x
3. Step 3: Cross multiply
   1,277,240x = 2,128,648 × 2,128,648
4. Step 4: Simplify right side
   1,277,240x = 4,531,142,307,904
5. Step 5: Solve for x
   x = 4,531,142,307,904/1,277,240
6. Step 6: Final answer
   x = 3,547,604.45