Finding the Third Proportional to 21,570 and 30,447

Step by Step Solution

1. Step 1: Write the proportion equation
   21,570 : 30,447 = 30,447 : x
2. Step 2: Convert to fraction form
   21,570/30,447 = 30,447/x
3. Step 3: Cross multiply
   21,570x = 30,447 × 30,447
4. Step 4: Simplify right side
   21,570x = 927,019,809
5. Step 5: Solve for x
   x = 927,019,809/21,570
6. Step 6: Final answer
   x = 42,977.27