Finding the Third Proportional to 129,618 and 300,260

Step by Step Solution

1. Step 1: Write the proportion equation
   129,618 : 300,260 = 300,260 : x
2. Step 2: Convert to fraction form
   129,618/300,260 = 300,260/x
3. Step 3: Cross multiply
   129,618x = 300,260 × 300,260
4. Step 4: Simplify right side
   129,618x = 90,156,067,600
5. Step 5: Solve for x
   x = 90,156,067,600/129,618
6. Step 6: Final answer
   x = 695,552.07