Finding the Third Proportional to 620,904 and 1,323,216

Step by Step Solution

1. Step 1: Write the proportion equation
   620,904 : 1,323,216 = 1,323,216 : x
2. Step 2: Convert to fraction form
   620,904/1,323,216 = 1,323,216/x
3. Step 3: Cross multiply
   620,904x = 1,323,216 × 1,323,216
4. Step 4: Simplify right side
   620,904x = 1,750,900,582,656
5. Step 5: Solve for x
   x = 1,750,900,582,656/620,904
6. Step 6: Final answer
   x = 2,819,921.57