Finding the Third Proportional to 10,218 and 21,075

Step by Step Solution

1. Step 1: Write the proportion equation
   10,218 : 21,075 = 21,075 : x
2. Step 2: Convert to fraction form
   10,218/21,075 = 21,075/x
3. Step 3: Cross multiply
   10,218x = 21,075 × 21,075
4. Step 4: Simplify right side
   10,218x = 444,155,625
5. Step 5: Solve for x
   x = 444,155,625/10,218
6. Step 6: Final answer
   x = 43,467.96