Finding the Third Proportional to 12,969 and 20,290

Step by Step Solution

1. Step 1: Write the proportion equation
   12,969 : 20,290 = 20,290 : x
2. Step 2: Convert to fraction form
   12,969/20,290 = 20,290/x
3. Step 3: Cross multiply
   12,969x = 20,290 × 20,290
4. Step 4: Simplify right side
   12,969x = 411,684,100
5. Step 5: Solve for x
   x = 411,684,100/12,969
6. Step 6: Final answer
   x = 31,743.70