Finding the Third Proportional to 8,266 and 19,978

Step by Step Solution

1. Step 1: Write the proportion equation
   8,266 : 19,978 = 19,978 : x
2. Step 2: Convert to fraction form
   8,266/19,978 = 19,978/x
3. Step 3: Cross multiply
   8,266x = 19,978 × 19,978
4. Step 4: Simplify right side
   8,266x = 399,120,484
5. Step 5: Solve for x
   x = 399,120,484/8,266
6. Step 6: Final answer
   x = 48,284.60