Finding the Fourth Proportional to 403,748.82, 557,170.61 and 222,456.53

Step by Step Solution

1. Step 1: Write the proportion equation
   403,748.82 : 557,170.61 = 222,456.53 : x
2. Step 2: Convert to fraction form
   403,748.82/557,170.61 = 222,456.53/x
3. Step 3: Cross multiply
   403,748.82x = 557,170.61 × 222,456.53
4. Step 4: Simplify right side
   403,748.82x = 123,946,240,799.23
5. Step 5: Solve for x
   x = 123,946,240,799.23/403,748.82
6. Step 6: Final answer
   x = 306,988.49