Finding the Fourth Proportional to 485,411.98, 728,445.87 and 169,871.62

Step by Step Solution

1. Step 1: Write the proportion equation
   485,411.98 : 728,445.87 = 169,871.62 : x
2. Step 2: Convert to fraction form
   485,411.98/728,445.87 = 169,871.62/x
3. Step 3: Cross multiply
   485,411.98x = 728,445.87 × 169,871.62
4. Step 4: Simplify right side
   485,411.98x = 123,742,280,019.21
5. Step 5: Solve for x
   x = 123,742,280,019.21/485,411.98
6. Step 6: Final answer
   x = 254,922.18