Finding the Third Proportional to 9,978 and 16,560

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978 : 16,560 = 16,560 : x
2. Step 2: Convert to fraction form
   9,978/16,560 = 16,560/x
3. Step 3: Cross multiply
   9,978x = 16,560 × 16,560
4. Step 4: Simplify right side
   9,978x = 274,233,600
5. Step 5: Solve for x
   x = 274,233,600/9,978
6. Step 6: Final answer
   x = 27,483.82