Finding the Third Proportional to 3,900.38 and 8,529.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.38 : 8,529.75 = 8,529.75 : x
2. Step 2: Convert to fraction form
   3,900.38/8,529.75 = 8,529.75/x
3. Step 3: Cross multiply
   3,900.38x = 8,529.75 × 8,529.75
4. Step 4: Simplify right side
   3,900.38x = 72,756,635.06
5. Step 5: Solve for x
   x = 72,756,635.06/3,900.38
6. Step 6: Final answer
   x = 18,653.75