Finding the Third Proportional to 296,338.50 and 639,333

Step by Step Solution

1. Step 1: Write the proportion equation
   296,338.50 : 639,333 = 639,333 : x
2. Step 2: Convert to fraction form
   296,338.50/639,333 = 639,333/x
3. Step 3: Cross multiply
   296,338.50x = 639,333 × 639,333
4. Step 4: Simplify right side
   296,338.50x = 408,746,684,889
5. Step 5: Solve for x
   x = 408,746,684,889/296,338.50
6. Step 6: Final answer
   x = 1,379,323.59