Finding the Fourth Proportional to 2,779.72, 4,170.72 and 1,218.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,779.72 : 4,170.72 = 1,218.92 : x
2. Step 2: Convert to fraction form
   2,779.72/4,170.72 = 1,218.92/x
3. Step 3: Cross multiply
   2,779.72x = 4,170.72 × 1,218.92
4. Step 4: Simplify right side
   2,779.72x = 5,083,774.02
5. Step 5: Solve for x
   x = 5,083,774.02/2,779.72
6. Step 6: Final answer
   x = 1,828.88