Finding the Third Proportional to 3,171.75 and 3,513.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,171.75 : 3,513.38 = 3,513.38 : x
2. Step 2: Convert to fraction form
   3,171.75/3,513.38 = 3,513.38/x
3. Step 3: Cross multiply
   3,171.75x = 3,513.38 × 3,513.38
4. Step 4: Simplify right side
   3,171.75x = 12,343,803.89
5. Step 5: Solve for x
   x = 12,343,803.89/3,171.75
6. Step 6: Final answer
   x = 3,891.80