Finding the Fourth Proportional to 2,158.55, 3,237.72 and 677.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.55 : 3,237.72 = 677.73 : x
2. Step 2: Convert to fraction form
   2,158.55/3,237.72 = 677.73/x
3. Step 3: Cross multiply
   2,158.55x = 3,237.72 × 677.73
4. Step 4: Simplify right side
   2,158.55x = 2,194,299.98
5. Step 5: Solve for x
   x = 2,194,299.98/2,158.55
6. Step 6: Final answer
   x = 1,016.56