Finding the Fourth Proportional to 2,815.96, 4,222.86 and 1,355.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.96 : 4,222.86 = 1,355.80 : x
2. Step 2: Convert to fraction form
   2,815.96/4,222.86 = 1,355.80/x
3. Step 3: Cross multiply
   2,815.96x = 4,222.86 × 1,355.80
4. Step 4: Simplify right side
   2,815.96x = 5,725,353.59
5. Step 5: Solve for x
   x = 5,725,353.59/2,815.96
6. Step 6: Final answer
   x = 2,033.18