Finding the Third Proportional to 623,878 and 1,277,312

Step by Step Solution

1. Step 1: Write the proportion equation
   623,878 : 1,277,312 = 1,277,312 : x
2. Step 2: Convert to fraction form
   623,878/1,277,312 = 1,277,312/x
3. Step 3: Cross multiply
   623,878x = 1,277,312 × 1,277,312
4. Step 4: Simplify right side
   623,878x = 1,631,525,945,344
5. Step 5: Solve for x
   x = 1,631,525,945,344/623,878
6. Step 6: Final answer
   x = 2,615,136.21