Finding the Third Proportional to 4,128.75 and 9,001.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128.75 : 9,001.69 = 9,001.69 : x
2. Step 2: Convert to fraction form
   4,128.75/9,001.69 = 9,001.69/x
3. Step 3: Cross multiply
   4,128.75x = 9,001.69 × 9,001.69
4. Step 4: Simplify right side
   4,128.75x = 81,030,377.85
5. Step 5: Solve for x
   x = 81,030,377.85/4,128.75
6. Step 6: Final answer
   x = 19,625.89