Finding the Third Proportional to 8,934.50 and 12,821.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,934.50 : 12,821.50 = 12,821.50 : x
2. Step 2: Convert to fraction form
   8,934.50/12,821.50 = 12,821.50/x
3. Step 3: Cross multiply
   8,934.50x = 12,821.50 × 12,821.50
4. Step 4: Simplify right side
   8,934.50x = 164,390,862.25
5. Step 5: Solve for x
   x = 164,390,862.25/8,934.50
6. Step 6: Final answer
   x = 18,399.56