Finding the Third Proportional to 424,576.50 and 681,768

Step by Step Solution

1. Step 1: Write the proportion equation
   424,576.50 : 681,768 = 681,768 : x
2. Step 2: Convert to fraction form
   424,576.50/681,768 = 681,768/x
3. Step 3: Cross multiply
   424,576.50x = 681,768 × 681,768
4. Step 4: Simplify right side
   424,576.50x = 464,807,605,824
5. Step 5: Solve for x
   x = 464,807,605,824/424,576.50
6. Step 6: Final answer
   x = 1,094,755.85