Finding the Third Proportional to 21,021 and 43,822.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,021 : 43,822.50 = 43,822.50 : x
2. Step 2: Convert to fraction form
   21,021/43,822.50 = 43,822.50/x
3. Step 3: Cross multiply
   21,021x = 43,822.50 × 43,822.50
4. Step 4: Simplify right side
   21,021x = 1,920,411,506.25
5. Step 5: Solve for x
   x = 1,920,411,506.25/21,021
6. Step 6: Final answer
   x = 91,356.81