Finding the Fourth Proportional to 403,424.72, 556,721.52 and 222,132.86

Step by Step Solution

1. Step 1: Write the proportion equation
   403,424.72 : 556,721.52 = 222,132.86 : x
2. Step 2: Convert to fraction form
   403,424.72/556,721.52 = 222,132.86/x
3. Step 3: Cross multiply
   403,424.72x = 556,721.52 × 222,132.86
4. Step 4: Simplify right side
   403,424.72x = 123,666,143,461.15
5. Step 5: Solve for x
   x = 123,666,143,461.15/403,424.72
6. Step 6: Final answer
   x = 306,540.82