Finding the Third Proportional to 859.50 and 1,740

Step by Step Solution

1. Step 1: Write the proportion equation
   859.50 : 1,740 = 1,740 : x
2. Step 2: Convert to fraction form
   859.50/1,740 = 1,740/x
3. Step 3: Cross multiply
   859.50x = 1,740 × 1,740
4. Step 4: Simplify right side
   859.50x = 3,027,600
5. Step 5: Solve for x
   x = 3,027,600/859.50
6. Step 6: Final answer
   x = 3,522.51