Finding the Third Proportional to 9,687.75 and 21,005.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,687.75 : 21,005.25 = 21,005.25 : x
2. Step 2: Convert to fraction form
   9,687.75/21,005.25 = 21,005.25/x
3. Step 3: Cross multiply
   9,687.75x = 21,005.25 × 21,005.25
4. Step 4: Simplify right side
   9,687.75x = 441,220,527.56
5. Step 5: Solve for x
   x = 441,220,527.56/9,687.75
6. Step 6: Final answer
   x = 45,544.17