Finding the Fourth Proportional to 2,391.96, 3,591.72 and 1,422.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.96 : 3,591.72 = 1,422.39 : x
2. Step 2: Convert to fraction form
   2,391.96/3,591.72 = 1,422.39/x
3. Step 3: Cross multiply
   2,391.96x = 3,591.72 × 1,422.39
4. Step 4: Simplify right side
   2,391.96x = 5,108,826.61
5. Step 5: Solve for x
   x = 5,108,826.61/2,391.96
6. Step 6: Final answer
   x = 2,135.83