Finding the Fourth Proportional to 2,081.60, 2,872.86 and 1,185.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.60 : 2,872.86 = 1,185.56 : x
2. Step 2: Convert to fraction form
   2,081.60/2,872.86 = 1,185.56/x
3. Step 3: Cross multiply
   2,081.60x = 2,872.86 × 1,185.56
4. Step 4: Simplify right side
   2,081.60x = 3,405,947.90
5. Step 5: Solve for x
   x = 3,405,947.90/2,081.60
6. Step 6: Final answer
   x = 1,636.22