Finding the Third Proportional to 3,615.75 and 3,906

Step by Step Solution

1. Step 1: Write the proportion equation
   3,615.75 : 3,906 = 3,906 : x
2. Step 2: Convert to fraction form
   3,615.75/3,906 = 3,906/x
3. Step 3: Cross multiply
   3,615.75x = 3,906 × 3,906
4. Step 4: Simplify right side
   3,615.75x = 15,256,836
5. Step 5: Solve for x
   x = 15,256,836/3,615.75
6. Step 6: Final answer
   x = 4,219.55