Finding the Fourth Proportional to 2,742.72, 3,779.04 and 1,856.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,742.72 : 3,779.04 = 1,856.97 : x
2. Step 2: Convert to fraction form
   2,742.72/3,779.04 = 1,856.97/x
3. Step 3: Cross multiply
   2,742.72x = 3,779.04 × 1,856.97
4. Step 4: Simplify right side
   2,742.72x = 7,017,563.91
5. Step 5: Solve for x
   x = 7,017,563.91/2,742.72
6. Step 6: Final answer
   x = 2,558.61