Finding the Third Proportional to 308,886 and 676,820

Step by Step Solution

1. Step 1: Write the proportion equation
   308,886 : 676,820 = 676,820 : x
2. Step 2: Convert to fraction form
   308,886/676,820 = 676,820/x
3. Step 3: Cross multiply
   308,886x = 676,820 × 676,820
4. Step 4: Simplify right side
   308,886x = 458,085,312,400
5. Step 5: Solve for x
   x = 458,085,312,400/308,886
6. Step 6: Final answer
   x = 1,483,023.87