Finding the Third Proportional to 4,111.50 and 8,989.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,111.50 : 8,989.50 = 8,989.50 : x
2. Step 2: Convert to fraction form
   4,111.50/8,989.50 = 8,989.50/x
3. Step 3: Cross multiply
   4,111.50x = 8,989.50 × 8,989.50
4. Step 4: Simplify right side
   4,111.50x = 80,811,110.25
5. Step 5: Solve for x
   x = 80,811,110.25/4,111.50
6. Step 6: Final answer
   x = 19,654.90