Finding the Fourth Proportional to 2,308.28, 3,186.06 and 1,609.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.28 : 3,186.06 = 1,609.40 : x
2. Step 2: Convert to fraction form
   2,308.28/3,186.06 = 1,609.40/x
3. Step 3: Cross multiply
   2,308.28x = 3,186.06 × 1,609.40
4. Step 4: Simplify right side
   2,308.28x = 5,127,644.96
5. Step 5: Solve for x
   x = 5,127,644.96/2,308.28
6. Step 6: Final answer
   x = 2,221.41