Finding the Third Proportional to 118,719 and 255,870

Step by Step Solution

1. Step 1: Write the proportion equation
   118,719 : 255,870 = 255,870 : x
2. Step 2: Convert to fraction form
   118,719/255,870 = 255,870/x
3. Step 3: Cross multiply
   118,719x = 255,870 × 255,870
4. Step 4: Simplify right side
   118,719x = 65,469,456,900
5. Step 5: Solve for x
   x = 65,469,456,900/118,719
6. Step 6: Final answer
   x = 551,465.70