Finding the Third Proportional to 12,990 and 17,576

Step by Step Solution

1. Step 1: Write the proportion equation
   12,990 : 17,576 = 17,576 : x
2. Step 2: Convert to fraction form
   12,990/17,576 = 17,576/x
3. Step 3: Cross multiply
   12,990x = 17,576 × 17,576
4. Step 4: Simplify right side
   12,990x = 308,915,776
5. Step 5: Solve for x
   x = 308,915,776/12,990
6. Step 6: Final answer
   x = 23,781.05