Finding the Third Proportional to 255,186 and 557,064.56

Step by Step Solution

1. Step 1: Write the proportion equation
   255,186 : 557,064.56 = 557,064.56 : x
2. Step 2: Convert to fraction form
   255,186/557,064.56 = 557,064.56/x
3. Step 3: Cross multiply
   255,186x = 557,064.56 × 557,064.56
4. Step 4: Simplify right side
   255,186x = 310,320,926,793.32
5. Step 5: Solve for x
   x = 310,320,926,793.32/255,186
6. Step 6: Final answer
   x = 1,216,057.80