Finding the Fourth Proportional to 2,158.46, 3,237.55 and 771.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.46 : 3,237.55 = 771.73 : x
2. Step 2: Convert to fraction form
   2,158.46/3,237.55 = 771.73/x
3. Step 3: Cross multiply
   2,158.46x = 3,237.55 × 771.73
4. Step 4: Simplify right side
   2,158.46x = 2,498,498.27
5. Step 5: Solve for x
   x = 2,498,498.27/2,158.46
6. Step 6: Final answer
   x = 1,157.54