Finding the Fourth Proportional to 403,404.72, 556,694.04 and 222,111.99

Step by Step Solution

1. Step 1: Write the proportion equation
   403,404.72 : 556,694.04 = 222,111.99 : x
2. Step 2: Convert to fraction form
   403,404.72/556,694.04 = 222,111.99/x
3. Step 3: Cross multiply
   403,404.72x = 556,694.04 × 222,111.99
4. Step 4: Simplify right side
   403,404.72x = 123,648,421,045.54
5. Step 5: Solve for x
   x = 123,648,421,045.54/403,404.72
6. Step 6: Final answer
   x = 306,512.08