Finding the Third Proportional to 2,142.38 and 3,186.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.38 : 3,186.56 = 3,186.56 : x
2. Step 2: Convert to fraction form
   2,142.38/3,186.56 = 3,186.56/x
3. Step 3: Cross multiply
   2,142.38x = 3,186.56 × 3,186.56
4. Step 4: Simplify right side
   2,142.38x = 10,154,180.57
5. Step 5: Solve for x
   x = 10,154,180.57/2,142.38
6. Step 6: Final answer
   x = 4,739.68