Finding the Third Proportional to 191,857 and 300,309

Step by Step Solution

1. Step 1: Write the proportion equation
   191,857 : 300,309 = 300,309 : x
2. Step 2: Convert to fraction form
   191,857/300,309 = 300,309/x
3. Step 3: Cross multiply
   191,857x = 300,309 × 300,309
4. Step 4: Simplify right side
   191,857x = 90,185,495,481
5. Step 5: Solve for x
   x = 90,185,495,481/191,857
6. Step 6: Final answer
   x = 470,066.22