Finding the Fourth Proportional to 401,196.24, 553,625.28 and 219,876.12

Step by Step Solution

1. Step 1: Write the proportion equation
   401,196.24 : 553,625.28 = 219,876.12 : x
2. Step 2: Convert to fraction form
   401,196.24/553,625.28 = 219,876.12/x
3. Step 3: Cross multiply
   401,196.24x = 553,625.28 × 219,876.12
4. Step 4: Simplify right side
   401,196.24x = 121,728,978,500.31
5. Step 5: Solve for x
   x = 121,728,978,500.31/401,196.24
6. Step 6: Final answer
   x = 303,415.05