Finding the Third Proportional to 209,298 and 298,908

Step by Step Solution

1. Step 1: Write the proportion equation
   209,298 : 298,908 = 298,908 : x
2. Step 2: Convert to fraction form
   209,298/298,908 = 298,908/x
3. Step 3: Cross multiply
   209,298x = 298,908 × 298,908
4. Step 4: Simplify right side
   209,298x = 89,345,992,464
5. Step 5: Solve for x
   x = 89,345,992,464/209,298
6. Step 6: Final answer
   x = 426,884.12