Finding the Fourth Proportional to 2,222.67, 3,331.69 and 905.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.67 : 3,331.69 = 905.86 : x
2. Step 2: Convert to fraction form
   2,222.67/3,331.69 = 905.86/x
3. Step 3: Cross multiply
   2,222.67x = 3,331.69 × 905.86
4. Step 4: Simplify right side
   2,222.67x = 3,018,046.60
5. Step 5: Solve for x
   x = 3,018,046.60/2,222.67
6. Step 6: Final answer
   x = 1,357.85