Finding the Third Proportional to 139,469 and 304,858

Step by Step Solution

1. Step 1: Write the proportion equation
   139,469 : 304,858 = 304,858 : x
2. Step 2: Convert to fraction form
   139,469/304,858 = 304,858/x
3. Step 3: Cross multiply
   139,469x = 304,858 × 304,858
4. Step 4: Simplify right side
   139,469x = 92,938,400,164
5. Step 5: Solve for x
   x = 92,938,400,164/139,469
6. Step 6: Final answer
   x = 666,373.17