Finding the Third Proportional to 3,861.84 and 7,131.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861.84 : 7,131.38 = 7,131.38 : x
2. Step 2: Convert to fraction form
   3,861.84/7,131.38 = 7,131.38/x
3. Step 3: Cross multiply
   3,861.84x = 7,131.38 × 7,131.38
4. Step 4: Simplify right side
   3,861.84x = 50,856,509.39
5. Step 5: Solve for x
   x = 50,856,509.39/3,861.84
6. Step 6: Final answer
   x = 13,168.97