Finding the Fourth Proportional to 2,515.58, 3,773.72 and 871.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515.58 : 3,773.72 = 871.73 : x
2. Step 2: Convert to fraction form
   2,515.58/3,773.72 = 871.73/x
3. Step 3: Cross multiply
   2,515.58x = 3,773.72 × 871.73
4. Step 4: Simplify right side
   2,515.58x = 3,289,664.94
5. Step 5: Solve for x
   x = 3,289,664.94/2,515.58
6. Step 6: Final answer
   x = 1,307.72