Finding the Third Proportional to 21,018 and 43,008

Step by Step Solution

1. Step 1: Write the proportion equation
   21,018 : 43,008 = 43,008 : x
2. Step 2: Convert to fraction form
   21,018/43,008 = 43,008/x
3. Step 3: Cross multiply
   21,018x = 43,008 × 43,008
4. Step 4: Simplify right side
   21,018x = 1,849,688,064
5. Step 5: Solve for x
   x = 1,849,688,064/21,018
6. Step 6: Final answer
   x = 88,004.95