Finding the Third Proportional to 869.75 and 869.75

Step by Step Solution

1. Step 1: Write the proportion equation
   869.75 : 869.75 = 869.75 : x
2. Step 2: Convert to fraction form
   869.75/869.75 = 869.75/x
3. Step 3: Cross multiply
   869.75x = 869.75 × 869.75
4. Step 4: Simplify right side
   869.75x = 756,465.06
5. Step 5: Solve for x
   x = 756,465.06/869.75
6. Step 6: Final answer
   x = 869.75