Finding the Third Proportional to 9,969 and 19,815

Step by Step Solution

1. Step 1: Write the proportion equation
   9,969 : 19,815 = 19,815 : x
2. Step 2: Convert to fraction form
   9,969/19,815 = 19,815/x
3. Step 3: Cross multiply
   9,969x = 19,815 × 19,815
4. Step 4: Simplify right side
   9,969x = 392,634,225
5. Step 5: Solve for x
   x = 392,634,225/9,969
6. Step 6: Final answer
   x = 39,385.52