Finding the Fourth Proportional to 1,779.10, 2,669.48 and 1,120.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,779.10 : 2,669.48 = 1,120.82 : x
2. Step 2: Convert to fraction form
   1,779.10/2,669.48 = 1,120.82/x
3. Step 3: Cross multiply
   1,779.10x = 2,669.48 × 1,120.82
4. Step 4: Simplify right side
   1,779.10x = 2,992,016.05
5. Step 5: Solve for x
   x = 2,992,016.05/1,779.10
6. Step 6: Final answer
   x = 1,681.76