Finding the Third Proportional to 137,278 and 300,800

Step by Step Solution

1. Step 1: Write the proportion equation
   137,278 : 300,800 = 300,800 : x
2. Step 2: Convert to fraction form
   137,278/300,800 = 300,800/x
3. Step 3: Cross multiply
   137,278x = 300,800 × 300,800
4. Step 4: Simplify right side
   137,278x = 90,480,640,000
5. Step 5: Solve for x
   x = 90,480,640,000/137,278
6. Step 6: Final answer
   x = 659,105.17