Finding the Fourth Proportional to 2,255.56, 3,111.96 and 1,557.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.56 : 3,111.96 = 1,557.36 : x
2. Step 2: Convert to fraction form
   2,255.56/3,111.96 = 1,557.36/x
3. Step 3: Cross multiply
   2,255.56x = 3,111.96 × 1,557.36
4. Step 4: Simplify right side
   2,255.56x = 4,846,442.03
5. Step 5: Solve for x
   x = 4,846,442.03/2,255.56
6. Step 6: Final answer
   x = 2,148.66