Finding the Third Proportional to 63,812 and 140,488

Step by Step Solution

1. Step 1: Write the proportion equation
   63,812 : 140,488 = 140,488 : x
2. Step 2: Convert to fraction form
   63,812/140,488 = 140,488/x
3. Step 3: Cross multiply
   63,812x = 140,488 × 140,488
4. Step 4: Simplify right side
   63,812x = 19,736,878,144
5. Step 5: Solve for x
   x = 19,736,878,144/63,812
6. Step 6: Final answer
   x = 309,297.28