Finding the Third Proportional to 64,221 and 139,404

Step by Step Solution

1. Step 1: Write the proportion equation
   64,221 : 139,404 = 139,404 : x
2. Step 2: Convert to fraction form
   64,221/139,404 = 139,404/x
3. Step 3: Cross multiply
   64,221x = 139,404 × 139,404
4. Step 4: Simplify right side
   64,221x = 19,433,475,216
5. Step 5: Solve for x
   x = 19,433,475,216/64,221
6. Step 6: Final answer
   x = 302,603.12