Finding the Fourth Proportional to 403,447.06, 556,734.89 and 222,124.55

Step by Step Solution

1. Step 1: Write the proportion equation
   403,447.06 : 556,734.89 = 222,124.55 : x
2. Step 2: Convert to fraction form
   403,447.06/556,734.89 = 222,124.55/x
3. Step 3: Cross multiply
   403,447.06x = 556,734.89 × 222,124.55
4. Step 4: Simplify right side
   403,447.06x = 123,664,485,799.93
5. Step 5: Solve for x
   x = 123,664,485,799.93/403,447.06
6. Step 6: Final answer
   x = 306,519.74