Finding the Third Proportional to 8,821.50 and 13,664.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,821.50 : 13,664.25 = 13,664.25 : x
2. Step 2: Convert to fraction form
   8,821.50/13,664.25 = 13,664.25/x
3. Step 3: Cross multiply
   8,821.50x = 13,664.25 × 13,664.25
4. Step 4: Simplify right side
   8,821.50x = 186,711,728.06
5. Step 5: Solve for x
   x = 186,711,728.06/8,821.50
6. Step 6: Final answer
   x = 21,165.53