Finding the Fourth Proportional to 2,085.54, 3,127.35 and 786.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.54 : 3,127.35 = 786.18 : x
2. Step 2: Convert to fraction form
   2,085.54/3,127.35 = 786.18/x
3. Step 3: Cross multiply
   2,085.54x = 3,127.35 × 786.18
4. Step 4: Simplify right side
   2,085.54x = 2,458,660.02
5. Step 5: Solve for x
   x = 2,458,660.02/2,085.54
6. Step 6: Final answer
   x = 1,178.91