Finding the Fourth Proportional to 557,665, 769,581.30 and 303,016.12

Step by Step Solution

1. Step 1: Write the proportion equation
   557,665 : 769,581.30 = 303,016.12 : x
2. Step 2: Convert to fraction form
   557,665/769,581.30 = 303,016.12/x
3. Step 3: Cross multiply
   557,665x = 769,581.30 × 303,016.12
4. Step 4: Simplify right side
   557,665x = 233,195,539,550.56
5. Step 5: Solve for x
   x = 233,195,539,550.56/557,665
6. Step 6: Final answer
   x = 418,164.20