Finding the Fourth Proportional to 2,734.72, 3,774.12 and 1,555.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,734.72 : 3,774.12 = 1,555.90 : x
2. Step 2: Convert to fraction form
   2,734.72/3,774.12 = 1,555.90/x
3. Step 3: Cross multiply
   2,734.72x = 3,774.12 × 1,555.90
4. Step 4: Simplify right side
   2,734.72x = 5,872,153.31
5. Step 5: Solve for x
   x = 5,872,153.31/2,734.72
6. Step 6: Final answer
   x = 2,147.26