Finding the Third Proportional to 667.69 and 1,333.69

Step by Step Solution

1. Step 1: Write the proportion equation
   667.69 : 1,333.69 = 1,333.69 : x
2. Step 2: Convert to fraction form
   667.69/1,333.69 = 1,333.69/x
3. Step 3: Cross multiply
   667.69x = 1,333.69 × 1,333.69
4. Step 4: Simplify right side
   667.69x = 1,778,722.35
5. Step 5: Solve for x
   x = 1,778,722.35/667.69
6. Step 6: Final answer
   x = 2,664.00