Finding the Fourth Proportional to 557,300.27, 769,074.32 and 315,582.78

Step by Step Solution

1. Step 1: Write the proportion equation
   557,300.27 : 769,074.32 = 315,582.78 : x
2. Step 2: Convert to fraction form
   557,300.27/769,074.32 = 315,582.78/x
3. Step 3: Cross multiply
   557,300.27x = 769,074.32 × 315,582.78
4. Step 4: Simplify right side
   557,300.27x = 242,706,610,354.30
5. Step 5: Solve for x
   x = 242,706,610,354.30/557,300.27
6. Step 6: Final answer
   x = 435,504.21