Finding the Fourth Proportional to 403,819.59, 557,274.72 and 222,538.02

Step by Step Solution

1. Step 1: Write the proportion equation
   403,819.59 : 557,274.72 = 222,538.02 : x
2. Step 2: Convert to fraction form
   403,819.59/557,274.72 = 222,538.02/x
3. Step 3: Cross multiply
   403,819.59x = 557,274.72 × 222,538.02
4. Step 4: Simplify right side
   403,819.59x = 124,014,812,784.85
5. Step 5: Solve for x
   x = 124,014,812,784.85/403,819.59
6. Step 6: Final answer
   x = 307,104.50