Finding the Third Proportional to 308,878.50 and 676,806

Step by Step Solution

1. Step 1: Write the proportion equation
   308,878.50 : 676,806 = 676,806 : x
2. Step 2: Convert to fraction form
   308,878.50/676,806 = 676,806/x
3. Step 3: Cross multiply
   308,878.50x = 676,806 × 676,806
4. Step 4: Simplify right side
   308,878.50x = 458,066,361,636
5. Step 5: Solve for x
   x = 458,066,361,636/308,878.50
6. Step 6: Final answer
   x = 1,482,998.53