Finding the Third Proportional to 3,865 and 5,815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,865 : 5,815.50 = 5,815.50 : x
2. Step 2: Convert to fraction form
   3,865/5,815.50 = 5,815.50/x
3. Step 3: Cross multiply
   3,865x = 5,815.50 × 5,815.50
4. Step 4: Simplify right side
   3,865x = 33,820,040.25
5. Step 5: Solve for x
   x = 33,820,040.25/3,865
6. Step 6: Final answer
   x = 8,750.33