Finding the Third Proportional to 9,945.28 and 21,254.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.28 : 21,254.91 = 21,254.91 : x
2. Step 2: Convert to fraction form
   9,945.28/21,254.91 = 21,254.91/x
3. Step 3: Cross multiply
   9,945.28x = 21,254.91 × 21,254.91
4. Step 4: Simplify right side
   9,945.28x = 451,771,039.70
5. Step 5: Solve for x
   x = 451,771,039.70/9,945.28
6. Step 6: Final answer
   x = 45,425.67