Finding the Fourth Proportional to 2,085.06, 3,128.13 and 786.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.06 : 3,128.13 = 786.54 : x
2. Step 2: Convert to fraction form
   2,085.06/3,128.13 = 786.54/x
3. Step 3: Cross multiply
   2,085.06x = 3,128.13 × 786.54
4. Step 4: Simplify right side
   2,085.06x = 2,460,399.37
5. Step 5: Solve for x
   x = 2,460,399.37/2,085.06
6. Step 6: Final answer
   x = 1,180.01