Finding the Third Proportional to 191,858 and 300,310

Step by Step Solution

1. Step 1: Write the proportion equation
   191,858 : 300,310 = 300,310 : x
2. Step 2: Convert to fraction form
   191,858/300,310 = 300,310/x
3. Step 3: Cross multiply
   191,858x = 300,310 × 300,310
4. Step 4: Simplify right side
   191,858x = 90,186,096,100
5. Step 5: Solve for x
   x = 90,186,096,100/191,858
6. Step 6: Final answer
   x = 470,066.90