Finding the Third Proportional to 139,424 and 304,960

Step by Step Solution

1. Step 1: Write the proportion equation
   139,424 : 304,960 = 304,960 : x
2. Step 2: Convert to fraction form
   139,424/304,960 = 304,960/x
3. Step 3: Cross multiply
   139,424x = 304,960 × 304,960
4. Step 4: Simplify right side
   139,424x = 93,000,601,600
5. Step 5: Solve for x
   x = 93,000,601,600/139,424
6. Step 6: Final answer
   x = 667,034.38