Finding the Third Proportional to 21,789 and 30,683.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,789 : 30,683.38 = 30,683.38 : x
2. Step 2: Convert to fraction form
   21,789/30,683.38 = 30,683.38/x
3. Step 3: Cross multiply
   21,789x = 30,683.38 × 30,683.38
4. Step 4: Simplify right side
   21,789x = 941,469,501.39
5. Step 5: Solve for x
   x = 941,469,501.39/21,789
6. Step 6: Final answer
   x = 43,208.48