Finding the Fourth Proportional to 401,383.02, 553,914.82 and 220,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401,383.02 : 553,914.82 = 220,111.50 : x
2. Step 2: Convert to fraction form
   401,383.02/553,914.82 = 220,111.50/x
3. Step 3: Cross multiply
   401,383.02x = 553,914.82 × 220,111.50
4. Step 4: Simplify right side
   401,383.02x = 121,923,021,902.43
5. Step 5: Solve for x
   x = 121,923,021,902.43/401,383.02
6. Step 6: Final answer
   x = 303,757.30