Finding the Third Proportional to 146,162.25 and 315,639

Step by Step Solution

1. Step 1: Write the proportion equation
   146,162.25 : 315,639 = 315,639 : x
2. Step 2: Convert to fraction form
   146,162.25/315,639 = 315,639/x
3. Step 3: Cross multiply
   146,162.25x = 315,639 × 315,639
4. Step 4: Simplify right side
   146,162.25x = 99,627,978,321
5. Step 5: Solve for x
   x = 99,627,978,321/146,162.25
6. Step 6: Final answer
   x = 681,625.92