Finding the Third Proportional to 21,591 and 30,361

Step by Step Solution

1. Step 1: Write the proportion equation
   21,591 : 30,361 = 30,361 : x
2. Step 2: Convert to fraction form
   21,591/30,361 = 30,361/x
3. Step 3: Cross multiply
   21,591x = 30,361 × 30,361
4. Step 4: Simplify right side
   21,591x = 921,790,321
5. Step 5: Solve for x
   x = 921,790,321/21,591
6. Step 6: Final answer
   x = 42,693.27