Finding the Fourth Proportional to 2,118.97, 3,180.39 and 1,079.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.97 : 3,180.39 = 1,079.69 : x
2. Step 2: Convert to fraction form
   2,118.97/3,180.39 = 1,079.69/x
3. Step 3: Cross multiply
   2,118.97x = 3,180.39 × 1,079.69
4. Step 4: Simplify right side
   2,118.97x = 3,433,835.28
5. Step 5: Solve for x
   x = 3,433,835.28/2,118.97
6. Step 6: Final answer
   x = 1,620.52