Finding the Fourth Proportional to 1,404.09, 2,107.96 and 1,079.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.09 : 2,107.96 = 1,079.69 : x
2. Step 2: Convert to fraction form
   1,404.09/2,107.96 = 1,079.69/x
3. Step 3: Cross multiply
   1,404.09x = 2,107.96 × 1,079.69
4. Step 4: Simplify right side
   1,404.09x = 2,275,930.09
5. Step 5: Solve for x
   x = 2,275,930.09/1,404.09
6. Step 6: Final answer
   x = 1,620.93