Finding the Fourth Proportional to 2,815.16, 4,216.38 and 1,355.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.16 : 4,216.38 = 1,355.40 : x
2. Step 2: Convert to fraction form
   2,815.16/4,216.38 = 1,355.40/x
3. Step 3: Cross multiply
   2,815.16x = 4,216.38 × 1,355.40
4. Step 4: Simplify right side
   2,815.16x = 5,714,881.45
5. Step 5: Solve for x
   x = 5,714,881.45/2,815.16
6. Step 6: Final answer
   x = 2,030.04