Finding the Third Proportional to 334,300.50 and 681,561

Step by Step Solution

1. Step 1: Write the proportion equation
   334,300.50 : 681,561 = 681,561 : x
2. Step 2: Convert to fraction form
   334,300.50/681,561 = 681,561/x
3. Step 3: Cross multiply
   334,300.50x = 681,561 × 681,561
4. Step 4: Simplify right side
   334,300.50x = 464,525,396,721
5. Step 5: Solve for x
   x = 464,525,396,721/334,300.50
6. Step 6: Final answer
   x = 1,389,544.43