Finding the Third Proportional to 21,316 and 43,676

Step by Step Solution

1. Step 1: Write the proportion equation
   21,316 : 43,676 = 43,676 : x
2. Step 2: Convert to fraction form
   21,316/43,676 = 43,676/x
3. Step 3: Cross multiply
   21,316x = 43,676 × 43,676
4. Step 4: Simplify right side
   21,316x = 1,907,592,976
5. Step 5: Solve for x
   x = 1,907,592,976/21,316
6. Step 6: Final answer
   x = 89,491.13