Finding the Third Proportional to 10,218 and 21,074

Step by Step Solution

1. Step 1: Write the proportion equation
   10,218 : 21,074 = 21,074 : x
2. Step 2: Convert to fraction form
   10,218/21,074 = 21,074/x
3. Step 3: Cross multiply
   10,218x = 21,074 × 21,074
4. Step 4: Simplify right side
   10,218x = 444,113,476
5. Step 5: Solve for x
   x = 444,113,476/10,218
6. Step 6: Final answer
   x = 43,463.84