Finding the Third Proportional to 817.45 and 1,267.59

Step by Step Solution

1. Step 1: Write the proportion equation
   817.45 : 1,267.59 = 1,267.59 : x
2. Step 2: Convert to fraction form
   817.45/1,267.59 = 1,267.59/x
3. Step 3: Cross multiply
   817.45x = 1,267.59 × 1,267.59
4. Step 4: Simplify right side
   817.45x = 1,606,793.92
5. Step 5: Solve for x
   x = 1,606,793.92/817.45
6. Step 6: Final answer
   x = 1,965.61