Finding the Third Proportional to 123,718 and 275,768

Step by Step Solution

1. Step 1: Write the proportion equation
   123,718 : 275,768 = 275,768 : x
2. Step 2: Convert to fraction form
   123,718/275,768 = 275,768/x
3. Step 3: Cross multiply
   123,718x = 275,768 × 275,768
4. Step 4: Simplify right side
   123,718x = 76,047,989,824
5. Step 5: Solve for x
   x = 76,047,989,824/123,718
6. Step 6: Final answer
   x = 614,688.16