Finding the Fourth Proportional to 1,919.57, 2,648.59 and 1,080.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919.57 : 2,648.59 = 1,080.18 : x
2. Step 2: Convert to fraction form
   1,919.57/2,648.59 = 1,080.18/x
3. Step 3: Cross multiply
   1,919.57x = 2,648.59 × 1,080.18
4. Step 4: Simplify right side
   1,919.57x = 2,860,951.25
5. Step 5: Solve for x
   x = 2,860,951.25/1,919.57
6. Step 6: Final answer
   x = 1,490.42