Finding the Fourth Proportional to 401,456.52, 554,016.24 and 220,185

Step by Step Solution

1. Step 1: Write the proportion equation
   401,456.52 : 554,016.24 = 220,185 : x
2. Step 2: Convert to fraction form
   401,456.52/554,016.24 = 220,185/x
3. Step 3: Cross multiply
   401,456.52x = 554,016.24 × 220,185
4. Step 4: Simplify right side
   401,456.52x = 121,986,065,804.40
5. Step 5: Solve for x
   x = 121,986,065,804.40/401,456.52
6. Step 6: Final answer
   x = 303,858.72