Finding the Third Proportional to 9,721.03 and 20,479.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.03 : 20,479.69 = 20,479.69 : x
2. Step 2: Convert to fraction form
   9,721.03/20,479.69 = 20,479.69/x
3. Step 3: Cross multiply
   9,721.03x = 20,479.69 × 20,479.69
4. Step 4: Simplify right side
   9,721.03x = 419,417,600.10
5. Step 5: Solve for x
   x = 419,417,600.10/9,721.03
6. Step 6: Final answer
   x = 43,145.38