Finding the Third Proportional to 139,928 and 300,592

Step by Step Solution

1. Step 1: Write the proportion equation
   139,928 : 300,592 = 300,592 : x
2. Step 2: Convert to fraction form
   139,928/300,592 = 300,592/x
3. Step 3: Cross multiply
   139,928x = 300,592 × 300,592
4. Step 4: Simplify right side
   139,928x = 90,355,550,464
5. Step 5: Solve for x
   x = 90,355,550,464/139,928
6. Step 6: Final answer
   x = 645,728.88