Finding the Fourth Proportional to 577,081.69, 796,347.98 and 318,945.30

Step by Step Solution

1. Step 1: Write the proportion equation
   577,081.69 : 796,347.98 = 318,945.30 : x
2. Step 2: Convert to fraction form
   577,081.69/796,347.98 = 318,945.30/x
3. Step 3: Cross multiply
   577,081.69x = 796,347.98 × 318,945.30
4. Step 4: Simplify right side
   577,081.69x = 253,991,442,897.54
5. Step 5: Solve for x
   x = 253,991,442,897.54/577,081.69
6. Step 6: Final answer
   x = 440,130.83