Finding the Fourth Proportional to 1,508.56, 2,081.79 and 845.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,508.56 : 2,081.79 = 845.57 : x
2. Step 2: Convert to fraction form
   1,508.56/2,081.79 = 845.57/x
3. Step 3: Cross multiply
   1,508.56x = 2,081.79 × 845.57
4. Step 4: Simplify right side
   1,508.56x = 1,760,304.37
5. Step 5: Solve for x
   x = 1,760,304.37/1,508.56
6. Step 6: Final answer
   x = 1,166.88