Finding the Third Proportional to 326,172.50 and 674,719

Step by Step Solution

1. Step 1: Write the proportion equation
   326,172.50 : 674,719 = 674,719 : x
2. Step 2: Convert to fraction form
   326,172.50/674,719 = 674,719/x
3. Step 3: Cross multiply
   326,172.50x = 674,719 × 674,719
4. Step 4: Simplify right side
   326,172.50x = 455,245,728,961
5. Step 5: Solve for x
   x = 455,245,728,961/326,172.50
6. Step 6: Final answer
   x = 1,395,720.76