Finding the Third Proportional to 13,990 and 21,836

Step by Step Solution

1. Step 1: Write the proportion equation
   13,990 : 21,836 = 21,836 : x
2. Step 2: Convert to fraction form
   13,990/21,836 = 21,836/x
3. Step 3: Cross multiply
   13,990x = 21,836 × 21,836
4. Step 4: Simplify right side
   13,990x = 476,810,896
5. Step 5: Solve for x
   x = 476,810,896/13,990
6. Step 6: Final answer
   x = 34,082.27