Finding the Third Proportional to 162,128 and 259,003.75

Step by Step Solution

1. Step 1: Write the proportion equation
   162,128 : 259,003.75 = 259,003.75 : x
2. Step 2: Convert to fraction form
   162,128/259,003.75 = 259,003.75/x
3. Step 3: Cross multiply
   162,128x = 259,003.75 × 259,003.75
4. Step 4: Simplify right side
   162,128x = 67,082,942,514.06
5. Step 5: Solve for x
   x = 67,082,942,514.06/162,128
6. Step 6: Final answer
   x = 413,765.31