Finding the Third Proportional to 295,388.25 and 648,216

Step by Step Solution

1. Step 1: Write the proportion equation
   295,388.25 : 648,216 = 648,216 : x
2. Step 2: Convert to fraction form
   295,388.25/648,216 = 648,216/x
3. Step 3: Cross multiply
   295,388.25x = 648,216 × 648,216
4. Step 4: Simplify right side
   295,388.25x = 420,183,982,656
5. Step 5: Solve for x
   x = 420,183,982,656/295,388.25
6. Step 6: Final answer
   x = 1,422,480.35