Finding the Third Proportional to 10,447.75 and 21,759.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,447.75 : 21,759.50 = 21,759.50 : x
2. Step 2: Convert to fraction form
   10,447.75/21,759.50 = 21,759.50/x
3. Step 3: Cross multiply
   10,447.75x = 21,759.50 × 21,759.50
4. Step 4: Simplify right side
   10,447.75x = 473,475,840.25
5. Step 5: Solve for x
   x = 473,475,840.25/10,447.75
6. Step 6: Final answer
   x = 45,318.45