Finding the Fourth Proportional to 554,976.82, 765,866.71 and 300,328.21

Step by Step Solution

1. Step 1: Write the proportion equation
   554,976.82 : 765,866.71 = 300,328.21 : x
2. Step 2: Convert to fraction form
   554,976.82/765,866.71 = 300,328.21/x
3. Step 3: Cross multiply
   554,976.82x = 765,866.71 × 300,328.21
4. Step 4: Simplify right side
   554,976.82x = 230,011,378,112.89
5. Step 5: Solve for x
   x = 230,011,378,112.89/554,976.82
6. Step 6: Final answer
   x = 414,452.23