Finding the Fourth Proportional to 2,287, 3,156.42 and 1,355.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287 : 3,156.42 = 1,355.32 : x
2. Step 2: Convert to fraction form
   2,287/3,156.42 = 1,355.32/x
3. Step 3: Cross multiply
   2,287x = 3,156.42 × 1,355.32
4. Step 4: Simplify right side
   2,287x = 4,277,959.15
5. Step 5: Solve for x
   x = 4,277,959.15/2,287
6. Step 6: Final answer
   x = 1,870.55