Finding the Fourth Proportional to 404,003.10, 557,528.16 and 222,722.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,003.10 : 557,528.16 = 222,722.10 : x
2. Step 2: Convert to fraction form
   404,003.10/557,528.16 = 222,722.10/x
3. Step 3: Cross multiply
   404,003.10x = 557,528.16 × 222,722.10
4. Step 4: Simplify right side
   404,003.10x = 124,173,842,604.34
5. Step 5: Solve for x
   x = 124,173,842,604.34/404,003.10
6. Step 6: Final answer
   x = 307,358.64