Finding the Third Proportional to 3,818 and 7,978

Step by Step Solution

1. Step 1: Write the proportion equation
   3,818 : 7,978 = 7,978 : x
2. Step 2: Convert to fraction form
   3,818/7,978 = 7,978/x
3. Step 3: Cross multiply
   3,818x = 7,978 × 7,978
4. Step 4: Simplify right side
   3,818x = 63,648,484
5. Step 5: Solve for x
   x = 63,648,484/3,818
6. Step 6: Final answer
   x = 16,670.63