Finding the Third Proportional to 21,768 and 30,620

Step by Step Solution

1. Step 1: Write the proportion equation
   21,768 : 30,620 = 30,620 : x
2. Step 2: Convert to fraction form
   21,768/30,620 = 30,620/x
3. Step 3: Cross multiply
   21,768x = 30,620 × 30,620
4. Step 4: Simplify right side
   21,768x = 937,584,400
5. Step 5: Solve for x
   x = 937,584,400/21,768
6. Step 6: Final answer
   x = 43,071.68