Finding the Fourth Proportional to 2,557.34, 3,836.91 and 1,325.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.34 : 3,836.91 = 1,325.55 : x
2. Step 2: Convert to fraction form
   2,557.34/3,836.91 = 1,325.55/x
3. Step 3: Cross multiply
   2,557.34x = 3,836.91 × 1,325.55
4. Step 4: Simplify right side
   2,557.34x = 5,086,016.05
5. Step 5: Solve for x
   x = 5,086,016.05/2,557.34
6. Step 6: Final answer
   x = 1,988.80