Finding the Fourth Proportional to 2,034.30, 2,806.26 and 1,287.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,034.30 : 2,806.26 = 1,287.99 : x
2. Step 2: Convert to fraction form
   2,034.30/2,806.26 = 1,287.99/x
3. Step 3: Cross multiply
   2,034.30x = 2,806.26 × 1,287.99
4. Step 4: Simplify right side
   2,034.30x = 3,614,434.82
5. Step 5: Solve for x
   x = 3,614,434.82/2,034.30
6. Step 6: Final answer
   x = 1,776.75