Finding the Fourth Proportional to 2,531.72, 3,795.18 and 887.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,531.72 : 3,795.18 = 887.20 : x
2. Step 2: Convert to fraction form
   2,531.72/3,795.18 = 887.20/x
3. Step 3: Cross multiply
   2,531.72x = 3,795.18 × 887.20
4. Step 4: Simplify right side
   2,531.72x = 3,367,083.70
5. Step 5: Solve for x
   x = 3,367,083.70/2,531.72
6. Step 6: Final answer
   x = 1,329.96