Finding the Third Proportional to 9,855 and 21,250

Step by Step Solution

1. Step 1: Write the proportion equation
   9,855 : 21,250 = 21,250 : x
2. Step 2: Convert to fraction form
   9,855/21,250 = 21,250/x
3. Step 3: Cross multiply
   9,855x = 21,250 × 21,250
4. Step 4: Simplify right side
   9,855x = 451,562,500
5. Step 5: Solve for x
   x = 451,562,500/9,855
6. Step 6: Final answer
   x = 45,820.65