Finding the Third Proportional to 308,869.50 and 676,788

Step by Step Solution

1. Step 1: Write the proportion equation
   308,869.50 : 676,788 = 676,788 : x
2. Step 2: Convert to fraction form
   308,869.50/676,788 = 676,788/x
3. Step 3: Cross multiply
   308,869.50x = 676,788 × 676,788
4. Step 4: Simplify right side
   308,869.50x = 458,041,996,944
5. Step 5: Solve for x
   x = 458,041,996,944/308,869.50
6. Step 6: Final answer
   x = 1,482,962.86