Finding the Third Proportional to 10,199 and 21,053

Step by Step Solution

1. Step 1: Write the proportion equation
   10,199 : 21,053 = 21,053 : x
2. Step 2: Convert to fraction form
   10,199/21,053 = 21,053/x
3. Step 3: Cross multiply
   10,199x = 21,053 × 21,053
4. Step 4: Simplify right side
   10,199x = 443,228,809
5. Step 5: Solve for x
   x = 443,228,809/10,199
6. Step 6: Final answer
   x = 43,458.07