Finding the Third Proportional to 8,978 and 12,190

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978 : 12,190 = 12,190 : x
2. Step 2: Convert to fraction form
   8,978/12,190 = 12,190/x
3. Step 3: Cross multiply
   8,978x = 12,190 × 12,190
4. Step 4: Simplify right side
   8,978x = 148,596,100
5. Step 5: Solve for x
   x = 148,596,100/8,978
6. Step 6: Final answer
   x = 16,551.14