Finding the Third Proportional to 418.50 and 1,000

Step by Step Solution

1. Step 1: Write the proportion equation
   418.50 : 1,000 = 1,000 : x
2. Step 2: Convert to fraction form
   418.50/1,000 = 1,000/x
3. Step 3: Cross multiply
   418.50x = 1,000 × 1,000
4. Step 4: Simplify right side
   418.50x = 1,000,000
5. Step 5: Solve for x
   x = 1,000,000/418.50
6. Step 6: Final answer
   x = 2,389.49