Finding the Third Proportional to 764.50 and 1,666

Step by Step Solution

1. Step 1: Write the proportion equation
   764.50 : 1,666 = 1,666 : x
2. Step 2: Convert to fraction form
   764.50/1,666 = 1,666/x
3. Step 3: Cross multiply
   764.50x = 1,666 × 1,666
4. Step 4: Simplify right side
   764.50x = 2,775,556
5. Step 5: Solve for x
   x = 2,775,556/764.50
6. Step 6: Final answer
   x = 3,630.55