Finding the Fourth Proportional to 2,180.76, 3,271.20 and 1,087.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.76 : 3,271.20 = 1,087.32 : x
2. Step 2: Convert to fraction form
   2,180.76/3,271.20 = 1,087.32/x
3. Step 3: Cross multiply
   2,180.76x = 3,271.20 × 1,087.32
4. Step 4: Simplify right side
   2,180.76x = 3,556,841.18
5. Step 5: Solve for x
   x = 3,556,841.18/2,180.76
6. Step 6: Final answer
   x = 1,631.01