Finding the Third Proportional to 7,722.84 and 12,981.52

Step by Step Solution

1. Step 1: Write the proportion equation
   7,722.84 : 12,981.52 = 12,981.52 : x
2. Step 2: Convert to fraction form
   7,722.84/12,981.52 = 12,981.52/x
3. Step 3: Cross multiply
   7,722.84x = 12,981.52 × 12,981.52
4. Step 4: Simplify right side
   7,722.84x = 168,519,747.92
5. Step 5: Solve for x
   x = 168,519,747.92/7,722.84
6. Step 6: Final answer
   x = 21,820.94