Finding the Third Proportional to 139,992 and 300,720

Step by Step Solution

1. Step 1: Write the proportion equation
   139,992 : 300,720 = 300,720 : x
2. Step 2: Convert to fraction form
   139,992/300,720 = 300,720/x
3. Step 3: Cross multiply
   139,992x = 300,720 × 300,720
4. Step 4: Simplify right side
   139,992x = 90,432,518,400
5. Step 5: Solve for x
   x = 90,432,518,400/139,992
6. Step 6: Final answer
   x = 645,983.47