Finding the Third Proportional to 209,240 and 456,388

Step by Step Solution

1. Step 1: Write the proportion equation
   209,240 : 456,388 = 456,388 : x
2. Step 2: Convert to fraction form
   209,240/456,388 = 456,388/x
3. Step 3: Cross multiply
   209,240x = 456,388 × 456,388
4. Step 4: Simplify right side
   209,240x = 208,290,006,544
5. Step 5: Solve for x
   x = 208,290,006,544/209,240
6. Step 6: Final answer
   x = 995,459.79