Finding the Fourth Proportional to 2,625.52, 3,938.88 and 871.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,625.52 : 3,938.88 = 871.08 : x
2. Step 2: Convert to fraction form
   2,625.52/3,938.88 = 871.08/x
3. Step 3: Cross multiply
   2,625.52x = 3,938.88 × 871.08
4. Step 4: Simplify right side
   2,625.52x = 3,431,079.59
5. Step 5: Solve for x
   x = 3,431,079.59/2,625.52
6. Step 6: Final answer
   x = 1,306.82