Finding the Fourth Proportional to 3,388.56, 5,081.76 and 2,090.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,388.56 : 5,081.76 = 2,090.40 : x
2. Step 2: Convert to fraction form
   3,388.56/5,081.76 = 2,090.40/x
3. Step 3: Cross multiply
   3,388.56x = 5,081.76 × 2,090.40
4. Step 4: Simplify right side
   3,388.56x = 10,622,911.10
5. Step 5: Solve for x
   x = 10,622,911.10/3,388.56
6. Step 6: Final answer
   x = 3,134.93