Finding the Third Proportional to 21,398 and 43,984

Step by Step Solution

1. Step 1: Write the proportion equation
   21,398 : 43,984 = 43,984 : x
2. Step 2: Convert to fraction form
   21,398/43,984 = 43,984/x
3. Step 3: Cross multiply
   21,398x = 43,984 × 43,984
4. Step 4: Simplify right side
   21,398x = 1,934,592,256
5. Step 5: Solve for x
   x = 1,934,592,256/21,398
6. Step 6: Final answer
   x = 90,409.96