Finding the Fourth Proportional to 505,103.58, 756,822.78 and 453,017.34

Step by Step Solution

1. Step 1: Write the proportion equation
   505,103.58 : 756,822.78 = 453,017.34 : x
2. Step 2: Convert to fraction form
   505,103.58/756,822.78 = 453,017.34/x
3. Step 3: Cross multiply
   505,103.58x = 756,822.78 × 453,017.34
4. Step 4: Simplify right side
   505,103.58x = 342,853,842,647.01
5. Step 5: Solve for x
   x = 342,853,842,647.01/505,103.58
6. Step 6: Final answer
   x = 678,779.28