Finding the Fourth Proportional to 485,399.89, 728,427.89 and 169,859.53

Step by Step Solution

1. Step 1: Write the proportion equation
   485,399.89 : 728,427.89 = 169,859.53 : x
2. Step 2: Convert to fraction form
   485,399.89/728,427.89 = 169,859.53/x
3. Step 3: Cross multiply
   485,399.89x = 728,427.89 × 169,859.53
4. Step 4: Simplify right side
   485,399.89x = 123,730,419,034.29
5. Step 5: Solve for x
   x = 123,730,419,034.29/485,399.89
6. Step 6: Final answer
   x = 254,904.09