Finding the Fourth Proportional to 2,209.61, 3,314.00 and 1,286.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.61 : 3,314.00 = 1,286.97 : x
2. Step 2: Convert to fraction form
   2,209.61/3,314.00 = 1,286.97/x
3. Step 3: Cross multiply
   2,209.61x = 3,314.00 × 1,286.97
4. Step 4: Simplify right side
   2,209.61x = 4,265,012.15
5. Step 5: Solve for x
   x = 4,265,012.15/2,209.61
6. Step 6: Final answer
   x = 1,930.21