Finding the Third Proportional to 2,178.75 and 3,228

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.75 : 3,228 = 3,228 : x
2. Step 2: Convert to fraction form
   2,178.75/3,228 = 3,228/x
3. Step 3: Cross multiply
   2,178.75x = 3,228 × 3,228
4. Step 4: Simplify right side
   2,178.75x = 10,419,984
5. Step 5: Solve for x
   x = 10,419,984/2,178.75
6. Step 6: Final answer
   x = 4,782.55