Finding the Fourth Proportional to 2,779.08, 4,169.34 and 1,047.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,779.08 : 4,169.34 = 1,047.72 : x
2. Step 2: Convert to fraction form
   2,779.08/4,169.34 = 1,047.72/x
3. Step 3: Cross multiply
   2,779.08x = 4,169.34 × 1,047.72
4. Step 4: Simplify right side
   2,779.08x = 4,368,300.90
5. Step 5: Solve for x
   x = 4,368,300.90/2,779.08
6. Step 6: Final answer
   x = 1,571.85