Finding the Third Proportional to 139,138 and 304,516

Step by Step Solution

1. Step 1: Write the proportion equation
   139,138 : 304,516 = 304,516 : x
2. Step 2: Convert to fraction form
   139,138/304,516 = 304,516/x
3. Step 3: Cross multiply
   139,138x = 304,516 × 304,516
4. Step 4: Simplify right side
   139,138x = 92,729,994,256
5. Step 5: Solve for x
   x = 92,729,994,256/139,138
6. Step 6: Final answer
   x = 666,460.59