Finding the Third Proportional to 99,728 and 146,640

Step by Step Solution

1. Step 1: Write the proportion equation
   99,728 : 146,640 = 146,640 : x
2. Step 2: Convert to fraction form
   99,728/146,640 = 146,640/x
3. Step 3: Cross multiply
   99,728x = 146,640 × 146,640
4. Step 4: Simplify right side
   99,728x = 21,503,289,600
5. Step 5: Solve for x
   x = 21,503,289,600/99,728
6. Step 6: Final answer
   x = 215,619.38