Finding the Fourth Proportional to 2,615.67, 3,922.90 and 1,229.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.67 : 3,922.90 = 1,229.96 : x
2. Step 2: Convert to fraction form
   2,615.67/3,922.90 = 1,229.96/x
3. Step 3: Cross multiply
   2,615.67x = 3,922.90 × 1,229.96
4. Step 4: Simplify right side
   2,615.67x = 4,825,016.82
5. Step 5: Solve for x
   x = 4,825,016.82/2,615.67
6. Step 6: Final answer
   x = 1,844.66