Finding the Third Proportional to 139,444 and 331,330

Step by Step Solution

1. Step 1: Write the proportion equation
   139,444 : 331,330 = 331,330 : x
2. Step 2: Convert to fraction form
   139,444/331,330 = 331,330/x
3. Step 3: Cross multiply
   139,444x = 331,330 × 331,330
4. Step 4: Simplify right side
   139,444x = 109,779,568,900
5. Step 5: Solve for x
   x = 109,779,568,900/139,444
6. Step 6: Final answer
   x = 787,266.35