Finding the Fourth Proportional to 2,069.07, 3,104.34 and 1,287.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.07 : 3,104.34 = 1,287.96 : x
2. Step 2: Convert to fraction form
   2,069.07/3,104.34 = 1,287.96/x
3. Step 3: Cross multiply
   2,069.07x = 3,104.34 × 1,287.96
4. Step 4: Simplify right side
   2,069.07x = 3,998,265.75
5. Step 5: Solve for x
   x = 3,998,265.75/2,069.07
6. Step 6: Final answer
   x = 1,932.40