Finding the Third Proportional to 128,172.94 and 276,067.69

Step by Step Solution

1. Step 1: Write the proportion equation
   128,172.94 : 276,067.69 = 276,067.69 : x
2. Step 2: Convert to fraction form
   128,172.94/276,067.69 = 276,067.69/x
3. Step 3: Cross multiply
   128,172.94x = 276,067.69 × 276,067.69
4. Step 4: Simplify right side
   128,172.94x = 76,213,368,081.60
5. Step 5: Solve for x
   x = 76,213,368,081.60/128,172.94
6. Step 6: Final answer
   x = 594,613.57