Finding the Fourth Proportional to 403,446.56, 556,734.20 and 222,124.05

Step by Step Solution

1. Step 1: Write the proportion equation
   403,446.56 : 556,734.20 = 222,124.05 : x
2. Step 2: Convert to fraction form
   403,446.56/556,734.20 = 222,124.05/x
3. Step 3: Cross multiply
   403,446.56x = 556,734.20 × 222,124.05
4. Step 4: Simplify right side
   403,446.56x = 123,664,054,166.89
5. Step 5: Solve for x
   x = 123,664,054,166.89/403,446.56
6. Step 6: Final answer
   x = 306,519.05