Finding the Third Proportional to 140,021 and 307,258

Step by Step Solution

1. Step 1: Write the proportion equation
   140,021 : 307,258 = 307,258 : x
2. Step 2: Convert to fraction form
   140,021/307,258 = 307,258/x
3. Step 3: Cross multiply
   140,021x = 307,258 × 307,258
4. Step 4: Simplify right side
   140,021x = 94,407,478,564
5. Step 5: Solve for x
   x = 94,407,478,564/140,021
6. Step 6: Final answer
   x = 674,238.00