Finding the Third Proportional to 12,470 and 20,781

Step by Step Solution

1. Step 1: Write the proportion equation
   12,470 : 20,781 = 20,781 : x
2. Step 2: Convert to fraction form
   12,470/20,781 = 20,781/x
3. Step 3: Cross multiply
   12,470x = 20,781 × 20,781
4. Step 4: Simplify right side
   12,470x = 431,849,961
5. Step 5: Solve for x
   x = 431,849,961/12,470
6. Step 6: Final answer
   x = 34,631.11