Finding the Third Proportional to 3,311.82 and 7,131.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,311.82 : 7,131.48 = 7,131.48 : x
2. Step 2: Convert to fraction form
   3,311.82/7,131.48 = 7,131.48/x
3. Step 3: Cross multiply
   3,311.82x = 7,131.48 × 7,131.48
4. Step 4: Simplify right side
   3,311.82x = 50,858,013.68
5. Step 5: Solve for x
   x = 50,858,013.68/3,311.82
6. Step 6: Final answer
   x = 15,356.50