Finding the Third Proportional to 308,881.50 and 676,812

Step by Step Solution

1. Step 1: Write the proportion equation
   308,881.50 : 676,812 = 676,812 : x
2. Step 2: Convert to fraction form
   308,881.50/676,812 = 676,812/x
3. Step 3: Cross multiply
   308,881.50x = 676,812 × 676,812
4. Step 4: Simplify right side
   308,881.50x = 458,074,483,344
5. Step 5: Solve for x
   x = 458,074,483,344/308,881.50
6. Step 6: Final answer
   x = 1,483,010.42