Finding the Third Proportional to 140,724 and 250,272

Step by Step Solution

1. Step 1: Write the proportion equation
   140,724 : 250,272 = 250,272 : x
2. Step 2: Convert to fraction form
   140,724/250,272 = 250,272/x
3. Step 3: Cross multiply
   140,724x = 250,272 × 250,272
4. Step 4: Simplify right side
   140,724x = 62,636,073,984
5. Step 5: Solve for x
   x = 62,636,073,984/140,724
6. Step 6: Final answer
   x = 445,098.73