Finding the Third Proportional to 139,079 and 284,770

Step by Step Solution

1. Step 1: Write the proportion equation
   139,079 : 284,770 = 284,770 : x
2. Step 2: Convert to fraction form
   139,079/284,770 = 284,770/x
3. Step 3: Cross multiply
   139,079x = 284,770 × 284,770
4. Step 4: Simplify right side
   139,079x = 81,093,952,900
5. Step 5: Solve for x
   x = 81,093,952,900/139,079
6. Step 6: Final answer
   x = 583,078.34