Finding the Third Proportional to 13,634 and 20,860

Step by Step Solution

1. Step 1: Write the proportion equation
   13,634 : 20,860 = 20,860 : x
2. Step 2: Convert to fraction form
   13,634/20,860 = 20,860/x
3. Step 3: Cross multiply
   13,634x = 20,860 × 20,860
4. Step 4: Simplify right side
   13,634x = 435,139,600
5. Step 5: Solve for x
   x = 435,139,600/13,634
6. Step 6: Final answer
   x = 31,915.77