Finding the Fourth Proportional to 403,445.56, 556,732.81 and 222,123.05

Step by Step Solution

1. Step 1: Write the proportion equation
   403,445.56 : 556,732.81 = 222,123.05 : x
2. Step 2: Convert to fraction form
   403,445.56/556,732.81 = 222,123.05/x
3. Step 3: Cross multiply
   403,445.56x = 556,732.81 × 222,123.05
4. Step 4: Simplify right side
   403,445.56x = 123,663,189,792.27
5. Step 5: Solve for x
   x = 123,663,189,792.27/403,445.56
6. Step 6: Final answer
   x = 306,517.66