Finding the Third Proportional to 769.50 and 859.50

Step by Step Solution

1. Step 1: Write the proportion equation
   769.50 : 859.50 = 859.50 : x
2. Step 2: Convert to fraction form
   769.50/859.50 = 859.50/x
3. Step 3: Cross multiply
   769.50x = 859.50 × 859.50
4. Step 4: Simplify right side
   769.50x = 738,740.25
5. Step 5: Solve for x
   x = 738,740.25/769.50
6. Step 6: Final answer
   x = 960.03