Finding the Third Proportional to 9,900 and 21,084

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900 : 21,084 = 21,084 : x
2. Step 2: Convert to fraction form
   9,900/21,084 = 21,084/x
3. Step 3: Cross multiply
   9,900x = 21,084 × 21,084
4. Step 4: Simplify right side
   9,900x = 444,535,056
5. Step 5: Solve for x
   x = 444,535,056/9,900
6. Step 6: Final answer
   x = 44,902.53