Finding the Fourth Proportional to 2,229.20, 3,076.31 and 1,234.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,229.20 : 3,076.31 = 1,234.55 : x
2. Step 2: Convert to fraction form
   2,229.20/3,076.31 = 1,234.55/x
3. Step 3: Cross multiply
   2,229.20x = 3,076.31 × 1,234.55
4. Step 4: Simplify right side
   2,229.20x = 3,797,858.51
5. Step 5: Solve for x
   x = 3,797,858.51/2,229.20
6. Step 6: Final answer
   x = 1,703.69