Finding the Third Proportional to 667.50 and 1,371

Step by Step Solution

1. Step 1: Write the proportion equation
   667.50 : 1,371 = 1,371 : x
2. Step 2: Convert to fraction form
   667.50/1,371 = 1,371/x
3. Step 3: Cross multiply
   667.50x = 1,371 × 1,371
4. Step 4: Simplify right side
   667.50x = 1,879,641
5. Step 5: Solve for x
   x = 1,879,641/667.50
6. Step 6: Final answer
   x = 2,815.94