Finding the Fourth Proportional to 2,308.18, 3,185.97 and 1,609.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.18 : 3,185.97 = 1,609.78 : x
2. Step 2: Convert to fraction form
   2,308.18/3,185.97 = 1,609.78/x
3. Step 3: Cross multiply
   2,308.18x = 3,185.97 × 1,609.78
4. Step 4: Simplify right side
   2,308.18x = 5,128,710.79
5. Step 5: Solve for x
   x = 5,128,710.79/2,308.18
6. Step 6: Final answer
   x = 2,221.97