Finding the Third Proportional to 139,320 and 250,992

Step by Step Solution

1. Step 1: Write the proportion equation
   139,320 : 250,992 = 250,992 : x
2. Step 2: Convert to fraction form
   139,320/250,992 = 250,992/x
3. Step 3: Cross multiply
   139,320x = 250,992 × 250,992
4. Step 4: Simplify right side
   139,320x = 62,996,984,064
5. Step 5: Solve for x
   x = 62,996,984,064/139,320
6. Step 6: Final answer
   x = 452,174.73