Finding the Third Proportional to 1,628.44 and 4,229.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,628.44 : 4,229.72 = 4,229.72 : x
2. Step 2: Convert to fraction form
   1,628.44/4,229.72 = 4,229.72/x
3. Step 3: Cross multiply
   1,628.44x = 4,229.72 × 4,229.72
4. Step 4: Simplify right side
   1,628.44x = 17,890,520.70
5. Step 5: Solve for x
   x = 17,890,520.70/1,628.44
6. Step 6: Final answer
   x = 10,986.31