Finding the Third Proportional to 140,894 and 307,912

Step by Step Solution

1. Step 1: Write the proportion equation
   140,894 : 307,912 = 307,912 : x
2. Step 2: Convert to fraction form
   140,894/307,912 = 307,912/x
3. Step 3: Cross multiply
   140,894x = 307,912 × 307,912
4. Step 4: Simplify right side
   140,894x = 94,809,799,744
5. Step 5: Solve for x
   x = 94,809,799,744/140,894
6. Step 6: Final answer
   x = 672,915.81