Finding the Fourth Proportional to 665,086.69, 917,819.73 and 363,280.69

Step by Step Solution

1. Step 1: Write the proportion equation
   665,086.69 : 917,819.73 = 363,280.69 : x
2. Step 2: Convert to fraction form
   665,086.69/917,819.73 = 363,280.69/x
3. Step 3: Cross multiply
   665,086.69x = 917,819.73 × 363,280.69
4. Step 4: Simplify right side
   665,086.69x = 333,426,182,515.46
5. Step 5: Solve for x
   x = 333,426,182,515.46/665,086.69
6. Step 6: Final answer
   x = 501,327.40