Finding the Fourth Proportional to 2,815.31, 4,216.62 and 1,355.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.31 : 4,216.62 = 1,355.56 : x
2. Step 2: Convert to fraction form
   2,815.31/4,216.62 = 1,355.56/x
3. Step 3: Cross multiply
   2,815.31x = 4,216.62 × 1,355.56
4. Step 4: Simplify right side
   2,815.31x = 5,715,860.32
5. Step 5: Solve for x
   x = 5,715,860.32/2,815.31
6. Step 6: Final answer
   x = 2,030.28