Finding the Third Proportional to 4,425.19 and 9,685.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,425.19 : 9,685.69 = 9,685.69 : x
2. Step 2: Convert to fraction form
   4,425.19/9,685.69 = 9,685.69/x
3. Step 3: Cross multiply
   4,425.19x = 9,685.69 × 9,685.69
4. Step 4: Simplify right side
   4,425.19x = 93,812,542.35
5. Step 5: Solve for x
   x = 93,812,542.35/4,425.19
6. Step 6: Final answer
   x = 21,199.68