Finding the Third Proportional to 140,128 and 307,508

Step by Step Solution

1. Step 1: Write the proportion equation
   140,128 : 307,508 = 307,508 : x
2. Step 2: Convert to fraction form
   140,128/307,508 = 307,508/x
3. Step 3: Cross multiply
   140,128x = 307,508 × 307,508
4. Step 4: Simplify right side
   140,128x = 94,561,170,064
5. Step 5: Solve for x
   x = 94,561,170,064/140,128
6. Step 6: Final answer
   x = 674,819.95