Finding the Fourth Proportional to 2,013.18, 3,017.92 and 780.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.18 : 3,017.92 = 780.27 : x
2. Step 2: Convert to fraction form
   2,013.18/3,017.92 = 780.27/x
3. Step 3: Cross multiply
   2,013.18x = 3,017.92 × 780.27
4. Step 4: Simplify right side
   2,013.18x = 2,354,792.44
5. Step 5: Solve for x
   x = 2,354,792.44/2,013.18
6. Step 6: Final answer
   x = 1,169.69