Finding the Third Proportional to 140,276 and 300,249

Step by Step Solution

1. Step 1: Write the proportion equation
   140,276 : 300,249 = 300,249 : x
2. Step 2: Convert to fraction form
   140,276/300,249 = 300,249/x
3. Step 3: Cross multiply
   140,276x = 300,249 × 300,249
4. Step 4: Simplify right side
   140,276x = 90,149,462,001
5. Step 5: Solve for x
   x = 90,149,462,001/140,276
6. Step 6: Final answer
   x = 642,657.77