Finding the Third Proportional to 326,056 and 691,360

Step by Step Solution

1. Step 1: Write the proportion equation
   326,056 : 691,360 = 691,360 : x
2. Step 2: Convert to fraction form
   326,056/691,360 = 691,360/x
3. Step 3: Cross multiply
   326,056x = 691,360 × 691,360
4. Step 4: Simplify right side
   326,056x = 477,978,649,600
5. Step 5: Solve for x
   x = 477,978,649,600/326,056
6. Step 6: Final answer
   x = 1,465,940.36