Finding the Fourth Proportional to 554,931.20, 765,803.52 and 300,286.72

Step by Step Solution

1. Step 1: Write the proportion equation
   554,931.20 : 765,803.52 = 300,286.72 : x
2. Step 2: Convert to fraction form
   554,931.20/765,803.52 = 300,286.72/x
3. Step 3: Cross multiply
   554,931.20x = 765,803.52 × 300,286.72
4. Step 4: Simplify right side
   554,931.20x = 229,960,627,185.25
5. Step 5: Solve for x
   x = 229,960,627,185.25/554,931.20
6. Step 6: Final answer
   x = 414,394.84