Finding the Third Proportional to 139,492 and 304,256

Step by Step Solution

1. Step 1: Write the proportion equation
   139,492 : 304,256 = 304,256 : x
2. Step 2: Convert to fraction form
   139,492/304,256 = 304,256/x
3. Step 3: Cross multiply
   139,492x = 304,256 × 304,256
4. Step 4: Simplify right side
   139,492x = 92,571,713,536
5. Step 5: Solve for x
   x = 92,571,713,536/139,492
6. Step 6: Final answer
   x = 663,634.57