Finding the Third Proportional to 986 and 2,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   986 : 2,145.50 = 2,145.50 : x
2. Step 2: Convert to fraction form
   986/2,145.50 = 2,145.50/x
3. Step 3: Cross multiply
   986x = 2,145.50 × 2,145.50
4. Step 4: Simplify right side
   986x = 4,603,170.25
5. Step 5: Solve for x
   x = 4,603,170.25/986
6. Step 6: Final answer
   x = 4,668.53