Finding the Third Proportional to 611.50 and 1,435

Step by Step Solution

1. Step 1: Write the proportion equation
   611.50 : 1,435 = 1,435 : x
2. Step 2: Convert to fraction form
   611.50/1,435 = 1,435/x
3. Step 3: Cross multiply
   611.50x = 1,435 × 1,435
4. Step 4: Simplify right side
   611.50x = 2,059,225
5. Step 5: Solve for x
   x = 2,059,225/611.50
6. Step 6: Final answer
   x = 3,367.50