Finding the Fourth Proportional to 2,181.32, 3,271.16 and 1,085.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.32 : 3,271.16 = 1,085.10 : x
2. Step 2: Convert to fraction form
   2,181.32/3,271.16 = 1,085.10/x
3. Step 3: Cross multiply
   2,181.32x = 3,271.16 × 1,085.10
4. Step 4: Simplify right side
   2,181.32x = 3,549,530.29
5. Step 5: Solve for x
   x = 3,549,530.29/2,181.32
6. Step 6: Final answer
   x = 1,627.24