Finding the Fourth Proportional to 2,229.89, 3,077.21 and 1,235.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,229.89 : 3,077.21 = 1,235.16 : x
2. Step 2: Convert to fraction form
   2,229.89/3,077.21 = 1,235.16/x
3. Step 3: Cross multiply
   2,229.89x = 3,077.21 × 1,235.16
4. Step 4: Simplify right side
   2,229.89x = 3,800,840.53
5. Step 5: Solve for x
   x = 3,800,840.53/2,229.89
6. Step 6: Final answer
   x = 1,704.50