Finding the Third Proportional to 3,500.72 and 5,428.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,500.72 : 5,428.27 = 5,428.27 : x
2. Step 2: Convert to fraction form
   3,500.72/5,428.27 = 5,428.27/x
3. Step 3: Cross multiply
   3,500.72x = 5,428.27 × 5,428.27
4. Step 4: Simplify right side
   3,500.72x = 29,466,067.70
5. Step 5: Solve for x
   x = 29,466,067.70/3,500.72
6. Step 6: Final answer
   x = 8,417.15