Finding the Third Proportional to 3,896.86 and 8,522.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,896.86 : 8,522.72 = 8,522.72 : x
2. Step 2: Convert to fraction form
   3,896.86/8,522.72 = 8,522.72/x
3. Step 3: Cross multiply
   3,896.86x = 8,522.72 × 8,522.72
4. Step 4: Simplify right side
   3,896.86x = 72,636,734.89
5. Step 5: Solve for x
   x = 72,636,734.89/3,896.86
6. Step 6: Final answer
   x = 18,639.81