Finding the Third Proportional to 10,012 and 21,255

Step by Step Solution

1. Step 1: Write the proportion equation
   10,012 : 21,255 = 21,255 : x
2. Step 2: Convert to fraction form
   10,012/21,255 = 21,255/x
3. Step 3: Cross multiply
   10,012x = 21,255 × 21,255
4. Step 4: Simplify right side
   10,012x = 451,775,025
5. Step 5: Solve for x
   x = 451,775,025/10,012
6. Step 6: Final answer
   x = 45,123.35