Finding the Third Proportional to 250,621 and 383,870

Step by Step Solution

1. Step 1: Write the proportion equation
   250,621 : 383,870 = 383,870 : x
2. Step 2: Convert to fraction form
   250,621/383,870 = 383,870/x
3. Step 3: Cross multiply
   250,621x = 383,870 × 383,870
4. Step 4: Simplify right side
   250,621x = 147,356,176,900
5. Step 5: Solve for x
   x = 147,356,176,900/250,621
6. Step 6: Final answer
   x = 587,964.20