Finding the Third Proportional to 2,231.72 and 3,187.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.72 : 3,187.69 = 3,187.69 : x
2. Step 2: Convert to fraction form
   2,231.72/3,187.69 = 3,187.69/x
3. Step 3: Cross multiply
   2,231.72x = 3,187.69 × 3,187.69
4. Step 4: Simplify right side
   2,231.72x = 10,161,351.60
5. Step 5: Solve for x
   x = 10,161,351.60/2,231.72
6. Step 6: Final answer
   x = 4,553.15