Finding the Third Proportional to 9,768.38 and 21,057.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,768.38 : 21,057.75 = 21,057.75 : x
2. Step 2: Convert to fraction form
   9,768.38/21,057.75 = 21,057.75/x
3. Step 3: Cross multiply
   9,768.38x = 21,057.75 × 21,057.75
4. Step 4: Simplify right side
   9,768.38x = 443,428,835.06
5. Step 5: Solve for x
   x = 443,428,835.06/9,768.38
6. Step 6: Final answer
   x = 45,394.33