Finding the Third Proportional to 128,976 and 144,969

Step by Step Solution

1. Step 1: Write the proportion equation
   128,976 : 144,969 = 144,969 : x
2. Step 2: Convert to fraction form
   128,976/144,969 = 144,969/x
3. Step 3: Cross multiply
   128,976x = 144,969 × 144,969
4. Step 4: Simplify right side
   128,976x = 21,016,010,961
5. Step 5: Solve for x
   x = 21,016,010,961/128,976
6. Step 6: Final answer
   x = 162,945.13