Finding the Third Proportional to 17,991 and 18,549

Step by Step Solution

1. Step 1: Write the proportion equation
   17,991 : 18,549 = 18,549 : x
2. Step 2: Convert to fraction form
   17,991/18,549 = 18,549/x
3. Step 3: Cross multiply
   17,991x = 18,549 × 18,549
4. Step 4: Simplify right side
   17,991x = 344,065,401
5. Step 5: Solve for x
   x = 344,065,401/17,991
6. Step 6: Final answer
   x = 19,124.31