Finding the Third Proportional to 20,470 and 27,789

Step by Step Solution

1. Step 1: Write the proportion equation
   20,470 : 27,789 = 27,789 : x
2. Step 2: Convert to fraction form
   20,470/27,789 = 27,789/x
3. Step 3: Cross multiply
   20,470x = 27,789 × 27,789
4. Step 4: Simplify right side
   20,470x = 772,228,521
5. Step 5: Solve for x
   x = 772,228,521/20,470
6. Step 6: Final answer
   x = 37,724.89