Finding the Third Proportional to 10,211 and 21,061

Step by Step Solution

1. Step 1: Write the proportion equation
   10,211 : 21,061 = 21,061 : x
2. Step 2: Convert to fraction form
   10,211/21,061 = 21,061/x
3. Step 3: Cross multiply
   10,211x = 21,061 × 21,061
4. Step 4: Simplify right side
   10,211x = 443,565,721
5. Step 5: Solve for x
   x = 443,565,721/10,211
6. Step 6: Final answer
   x = 43,439.99