Finding the Fourth Proportional to 2,609.74, 3,914.58 and 1,310.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.74 : 3,914.58 = 1,310.89 : x
2. Step 2: Convert to fraction form
   2,609.74/3,914.58 = 1,310.89/x
3. Step 3: Cross multiply
   2,609.74x = 3,914.58 × 1,310.89
4. Step 4: Simplify right side
   2,609.74x = 5,131,583.78
5. Step 5: Solve for x
   x = 5,131,583.78/2,609.74
6. Step 6: Final answer
   x = 1,966.32