Finding the Third Proportional to 128,161 and 281,003

Step by Step Solution

1. Step 1: Write the proportion equation
   128,161 : 281,003 = 281,003 : x
2. Step 2: Convert to fraction form
   128,161/281,003 = 281,003/x
3. Step 3: Cross multiply
   128,161x = 281,003 × 281,003
4. Step 4: Simplify right side
   128,161x = 78,962,686,009
5. Step 5: Solve for x
   x = 78,962,686,009/128,161
6. Step 6: Final answer
   x = 616,121.02