Finding the Third Proportional to 2,790.28 and 4,338.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.28 : 4,338.56 = 4,338.56 : x
2. Step 2: Convert to fraction form
   2,790.28/4,338.56 = 4,338.56/x
3. Step 3: Cross multiply
   2,790.28x = 4,338.56 × 4,338.56
4. Step 4: Simplify right side
   2,790.28x = 18,823,124.57
5. Step 5: Solve for x
   x = 18,823,124.57/2,790.28
6. Step 6: Final answer
   x = 6,745.96