Finding the Fourth Proportional to 555,048.72, 765,969.48 and 300,399.84

Step by Step Solution

1. Step 1: Write the proportion equation
   555,048.72 : 765,969.48 = 300,399.84 : x
2. Step 2: Convert to fraction form
   555,048.72/765,969.48 = 300,399.84/x
3. Step 3: Cross multiply
   555,048.72x = 765,969.48 × 300,399.84
4. Step 4: Simplify right side
   555,048.72x = 230,097,109,236.88
5. Step 5: Solve for x
   x = 230,097,109,236.88/555,048.72
6. Step 6: Final answer
   x = 414,552.99