Finding the Fourth Proportional to 2,515.86, 3,774.22 and 871.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515.86 : 3,774.22 = 871.97 : x
2. Step 2: Convert to fraction form
   2,515.86/3,774.22 = 871.97/x
3. Step 3: Cross multiply
   2,515.86x = 3,774.22 × 871.97
4. Step 4: Simplify right side
   2,515.86x = 3,290,985.56
5. Step 5: Solve for x
   x = 3,290,985.56/2,515.86
6. Step 6: Final answer
   x = 1,308.10