Finding the Third Proportional to 21,789.75 and 30,683.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,789.75 : 30,683.25 = 30,683.25 : x
2. Step 2: Convert to fraction form
   21,789.75/30,683.25 = 30,683.25/x
3. Step 3: Cross multiply
   21,789.75x = 30,683.25 × 30,683.25
4. Step 4: Simplify right side
   21,789.75x = 941,461,830.56
5. Step 5: Solve for x
   x = 941,461,830.56/21,789.75
6. Step 6: Final answer
   x = 43,206.64