Finding the Fourth Proportional to 2,017.35, 2,785.16 and 1,309.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.35 : 2,785.16 = 1,309.47 : x
2. Step 2: Convert to fraction form
   2,017.35/2,785.16 = 1,309.47/x
3. Step 3: Cross multiply
   2,017.35x = 2,785.16 × 1,309.47
4. Step 4: Simplify right side
   2,017.35x = 3,647,076.92
5. Step 5: Solve for x
   x = 3,647,076.92/2,017.35
6. Step 6: Final answer
   x = 1,807.86