Finding the Third Proportional to 21,128 and 43,444

Step by Step Solution

1. Step 1: Write the proportion equation
   21,128 : 43,444 = 43,444 : x
2. Step 2: Convert to fraction form
   21,128/43,444 = 43,444/x
3. Step 3: Cross multiply
   21,128x = 43,444 × 43,444
4. Step 4: Simplify right side
   21,128x = 1,887,381,136
5. Step 5: Solve for x
   x = 1,887,381,136/21,128
6. Step 6: Final answer
   x = 89,330.80