Finding the Fourth Proportional to 2,855.49, 4,281.52 and 1,187.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,855.49 : 4,281.52 = 1,187.61 : x
2. Step 2: Convert to fraction form
   2,855.49/4,281.52 = 1,187.61/x
3. Step 3: Cross multiply
   2,855.49x = 4,281.52 × 1,187.61
4. Step 4: Simplify right side
   2,855.49x = 5,084,754.07
5. Step 5: Solve for x
   x = 5,084,754.07/2,855.49
6. Step 6: Final answer
   x = 1,780.70