Finding the Fourth Proportional to 2,551.40, 3,519.96 and 1,555.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.40 : 3,519.96 = 1,555.94 : x
2. Step 2: Convert to fraction form
   2,551.40/3,519.96 = 1,555.94/x
3. Step 3: Cross multiply
   2,551.40x = 3,519.96 × 1,555.94
4. Step 4: Simplify right side
   2,551.40x = 5,476,846.56
5. Step 5: Solve for x
   x = 5,476,846.56/2,551.40
6. Step 6: Final answer
   x = 2,146.60