Finding the Third Proportional to 12,902 and 20,007

Step by Step Solution

1. Step 1: Write the proportion equation
   12,902 : 20,007 = 20,007 : x
2. Step 2: Convert to fraction form
   12,902/20,007 = 20,007/x
3. Step 3: Cross multiply
   12,902x = 20,007 × 20,007
4. Step 4: Simplify right side
   12,902x = 400,280,049
5. Step 5: Solve for x
   x = 400,280,049/12,902
6. Step 6: Final answer
   x = 31,024.65