Finding the Third Proportional to 139,472 and 304,864

Step by Step Solution

1. Step 1: Write the proportion equation
   139,472 : 304,864 = 304,864 : x
2. Step 2: Convert to fraction form
   139,472/304,864 = 304,864/x
3. Step 3: Cross multiply
   139,472x = 304,864 × 304,864
4. Step 4: Simplify right side
   139,472x = 92,942,058,496
5. Step 5: Solve for x
   x = 92,942,058,496/139,472
6. Step 6: Final answer
   x = 666,385.07