Finding the Third Proportional to 308,857.50 and 676,764

Step by Step Solution

1. Step 1: Write the proportion equation
   308,857.50 : 676,764 = 676,764 : x
2. Step 2: Convert to fraction form
   308,857.50/676,764 = 676,764/x
3. Step 3: Cross multiply
   308,857.50x = 676,764 × 676,764
4. Step 4: Simplify right side
   308,857.50x = 458,009,511,696
5. Step 5: Solve for x
   x = 458,009,511,696/308,857.50
6. Step 6: Final answer
   x = 1,482,915.30