Finding the Fourth Proportional to 383,086.69, 528,659.60 and 222,035.15

Step by Step Solution

1. Step 1: Write the proportion equation
   383,086.69 : 528,659.60 = 222,035.15 : x
2. Step 2: Convert to fraction form
   383,086.69/528,659.60 = 222,035.15/x
3. Step 3: Cross multiply
   383,086.69x = 528,659.60 × 222,035.15
4. Step 4: Simplify right side
   383,086.69x = 117,381,013,584.94
5. Step 5: Solve for x
   x = 117,381,013,584.94/383,086.69
6. Step 6: Final answer
   x = 306,408.49