Finding the Third Proportional to 646,880 and 1,360,768

Step by Step Solution

1. Step 1: Write the proportion equation
   646,880 : 1,360,768 = 1,360,768 : x
2. Step 2: Convert to fraction form
   646,880/1,360,768 = 1,360,768/x
3. Step 3: Cross multiply
   646,880x = 1,360,768 × 1,360,768
4. Step 4: Simplify right side
   646,880x = 1,851,689,549,824
5. Step 5: Solve for x
   x = 1,851,689,549,824/646,880
6. Step 6: Final answer
   x = 2,862,493.12