Finding the Fourth Proportional to 288,745.83, 398,470.59 and 161,418.69

Step by Step Solution

1. Step 1: Write the proportion equation
   288,745.83 : 398,470.59 = 161,418.69 : x
2. Step 2: Convert to fraction form
   288,745.83/398,470.59 = 161,418.69/x
3. Step 3: Cross multiply
   288,745.83x = 398,470.59 × 161,418.69
4. Step 4: Simplify right side
   288,745.83x = 64,320,600,641.33
5. Step 5: Solve for x
   x = 64,320,600,641.33/288,745.83
6. Step 6: Final answer
   x = 222,758.54