Finding the Third Proportional to 129,736.50 and 278,874

Step by Step Solution

1. Step 1: Write the proportion equation
   129,736.50 : 278,874 = 278,874 : x
2. Step 2: Convert to fraction form
   129,736.50/278,874 = 278,874/x
3. Step 3: Cross multiply
   129,736.50x = 278,874 × 278,874
4. Step 4: Simplify right side
   129,736.50x = 77,770,707,876
5. Step 5: Solve for x
   x = 77,770,707,876/129,736.50
6. Step 6: Final answer
   x = 599,451.26