Finding the Third Proportional to 9,150 and 19,621

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150 : 19,621 = 19,621 : x
2. Step 2: Convert to fraction form
   9,150/19,621 = 19,621/x
3. Step 3: Cross multiply
   9,150x = 19,621 × 19,621
4. Step 4: Simplify right side
   9,150x = 384,983,641
5. Step 5: Solve for x
   x = 384,983,641/9,150
6. Step 6: Final answer
   x = 42,074.71