Finding the Fourth Proportional to 2,185.10, 3,279.34 and 1,090.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.10 : 3,279.34 = 1,090.40 : x
2. Step 2: Convert to fraction form
   2,185.10/3,279.34 = 1,090.40/x
3. Step 3: Cross multiply
   2,185.10x = 3,279.34 × 1,090.40
4. Step 4: Simplify right side
   2,185.10x = 3,575,792.34
5. Step 5: Solve for x
   x = 3,575,792.34/2,185.10
6. Step 6: Final answer
   x = 1,636.44