Finding the Fourth Proportional to 554,807.94, 765,627.39 and 309,796.49

Step by Step Solution

1. Step 1: Write the proportion equation
   554,807.94 : 765,627.39 = 309,796.49 : x
2. Step 2: Convert to fraction form
   554,807.94/765,627.39 = 309,796.49/x
3. Step 3: Cross multiply
   554,807.94x = 765,627.39 × 309,796.49
4. Step 4: Simplify right side
   554,807.94x = 237,188,674,241.72
5. Step 5: Solve for x
   x = 237,188,674,241.72/554,807.94
6. Step 6: Final answer
   x = 427,514.92