Finding the Fourth Proportional to 554,866.72, 765,716 and 300,217.92

Step by Step Solution

1. Step 1: Write the proportion equation
   554,866.72 : 765,716 = 300,217.92 : x
2. Step 2: Convert to fraction form
   554,866.72/765,716 = 300,217.92/x
3. Step 3: Cross multiply
   554,866.72x = 765,716 × 300,217.92
4. Step 4: Simplify right side
   554,866.72x = 229,881,664,830.72
5. Step 5: Solve for x
   x = 229,881,664,830.72/554,866.72
6. Step 6: Final answer
   x = 414,300.69