Finding the Fourth Proportional to 2,085.44, 3,128.69 and 786.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.44 : 3,128.69 = 786.92 : x
2. Step 2: Convert to fraction form
   2,085.44/3,128.69 = 786.92/x
3. Step 3: Cross multiply
   2,085.44x = 3,128.69 × 786.92
4. Step 4: Simplify right side
   2,085.44x = 2,462,015.06
5. Step 5: Solve for x
   x = 2,462,015.06/2,085.44
6. Step 6: Final answer
   x = 1,180.58